Loading...
HomeMy WebLinkAbout19512 KNOLL DR_BLD1393_2026 r� . CITY OF ARLINGTON BUILDING DEPARTMENT APPROVED O . FFICEC DAOPY NO CHANGES AUTHORIZED UNLESS APPROVED BY THE BUILDING INSPECTOR MAR 2011 paLt) 15q5 i ,. . � . .. . . r ,� i ; ; � ' . . Yp ��,..i a �........k...�.. . . f . .� I Design Code Acceptance ` Prescriptive Residential Wood Deck Construction Guide Based on theme International Residential Code guard decking ledger board blocking fasteners existing house floor construction O I, guard post ledger board attachment attachment to existing house e rim joist joists e e beam — post-to-beam connection (flush, tight bearing) footing joist-to-beam post connection Where applicable, provisions and details contained in this document are based on the International Residential Code(IRC)[bracketed text references applicable sections of the IRC]. Prescriptive construction methods recommended meet or exceed minimum requirements of the IRC. Provisions that are not found in the IRC are recommended as good industry practice.Where differences exist between provisions of this document and the IRC, provisions of the IRC shall apply. This document is not intended to preclude the use of other construction methods or materials.All construction and materials must be approved by the authority having jurisdiction. Every effort has been made to reflect the language and intent of the IRC. However, no assurance can be given that designs and construction made in accordance with this document meet the requirements of any particular jurisdiction. Copyright©2014 American Wood Council 2 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE CONTENTS MINIMUM REQUIREMENTS&LIMITATIONS...........2 PROHIBITED LEDGER ATTACHMENTS...................15 DECKING REQUIREMENTS...........................................3 LEDGER BOARD FASTENERS....................................15 JOIST SIZE.........................................................................3 NON-LEDGER DECKS-VERTICAL LOADS.............17 BEAM SIZE&ASSEMBLY REQUIREMENTS .............5 DECK LATERAL LOADS..............................................17 DECK FRAMING PLAN...................................................8 GUARD REQUIREMENTS............................................19 JOIST-TO-BEAM CONNECTION....................................9 GUARD POST ATTACHMENTS..................................19 JOIST HANGERS..............................................................9 STAIR REQUIREMENTS...............................................20 POST REQUIREMENTS.................................................10 STAIR HANDRAIL REQUIREMENTS.........................22 RIM JOIST REQUIREMENTS........................................I I STAIR FOOTING REQUIREMENTS............................22 FOOTINGS.......................................................................I I STAIR LIGHTING REQUIREMENTS.-........................22 LEDGER ATTACHMENT REQUIREMENTS...............13 FRAMING AT CHIMNEY OR BAY WINDOW...........23 MINIMUM REQUIREMENTS& LIMITATIONS zinc-coated galvanized steel,stainless steel,silicon 1. This document applies to single level residential bronze,or copper.Hot-dipped galvanized wood decks that are attached to the house to resist fasteners shall meet the requirements of ASTMA lateral forces. [R507.2.3] 153, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware, Class D 2. Overall deck length shall be equal to or less than for fasteners 3/8" diameter and smaller or Class C overall deck width. See DECK FRAMING PLAN for for fasteners with diameters over 7s". definition of deck length and width. 5as eaters other than nai IS and timber rivets shall 3. Minimum post size is 6x6 nominal and maximum post ha parmttteri to he of mechanically depositedzinr- height shall be in accordance with Table 4. coated steel with coating weights in accordance 4. All lumber shall be identified by the grade mark of, with ASTMB 695, Class 55, minimum. or certificate of inspection issued by,an approved ■ All connectors(joist hangers, cast-in-place post lumber grading or inspection bureau or agency anchors,etc.)shall be galvanized or shall be (www.alsc.org).All lumber and glued laminated stainless steel. Hardware to be hot-dipped prior to timber shall be a naturally durable species(such as fabrication shall meet ASTMA 653, Standard Redwood or Western Cedars with 90 percent or Specification for Steel Sheet, Zinc-Coated more of the width of each side is heartwood); or be (Galvanized) or Zinc-Iron Alloy-Coated pressure preservatively treated with an approved (Galvannealed) by the Hot-Dip Process, G-185 process in accordance with American Wood coating. Hardware to be hot-dipped galvanized Protection Association standards(Table 1)[R317 after fabrication shall meet ASTMA 123, and R318].All lumber in contact with the ground Specification for Zinc (Hot-Dip Galvanized) shall be approved preservative treated wood suitable Coatings on Iron and Steel Products. for ground contact. [R317.1.2] All cuts shall be field treated with an approved preservative(such as • Fasteners and connectors exposed to salt water or copper naphthenate) [R402.1.2]. located within 300 feet of a salt water shoreline shall be stainless steel grade 304 or 316. 5. All nails shall meet the requirements ofASTMF 1667.Threaded nails as stated in this document • Fasteners and connectors shall be of the same include helical(spiral)and annular(ring-shank) corrosion-resistant material. nails. Wood screws shall meet the requirements of • Other coated or non-ferrous fasteners or hardware ANSI/ASME B18.6.1.Bolts and lag screws shall shall be as approved by the authority having meet the requirements ofANS11ASME B18.2.1. jurisdiction. 6. Throughout this document, 'h" diameter bolts and 8. Decks supporting large concentrated loads such as lag screws are specified for various connections. hot tubs are beyond the scope of this document. Edge distance and spacing requirements are based 9. This document does not apply to decks which will on'/2"diameter fasteners. If larger(or smaller) experience snow loads,snow drift loads,or sliding fasteners are specified,edge distance and spacing snow loads that exceed 40 psf. shall be adjusted. 10. Lateral load resistance is limited to the prescriptive 7. To resist corrosion,the following is required provisions of R507.2.3 of the IRC. Alternative loads [R317.3]: and detailing shall be approved by the authority • All screws,bolts, washers,nuts,and nails for use having jurisdiction. with preservative treated wood shall be hot-dipped American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 3 11. Flashing shall be corrosion-resistant metal [R703.8] 12. Decks shall not be used or occupied until final of minimum nominal 0.019-inch thickness or inspection and approval is obtained. approved non-metallic material.Aluminum should 13. This document is not intended to preclude the use of not be used in direct contact with lumber treated other construction methods or materials not described with preservatives that contain copper such as ACQ, herein. Copper Azole,or ACZA. Table 1. Common Species and Use Categories for Decay Resistance.' Species Above Ground Ground Contact Southern Pine X X N Douglas Fir-Larch X X aa) Hem-Fir X X ate') SPF X MPonderosa Pine X X a) Red Pine X X a) a- Redwood X X Western Cedars X L- Redwood X z o Western Cedars X 1.Use categories listed in Table 1 are based on the American Wood Protection Association(AWPA)Book of Standards. 2.Above Ground—UC313; Ground Contact—UC4A. 3.Naturally durable species with 90% heartwood in width on each side need not be treated per minimum requirements. DECKING REQUIREMENTS authority having jurisdiction;however,connections All decking material shall be composed of dimension equivalent to those shown for lumber or span rated lumber(2"nominal thickness) or span rated decking in decking are assumed. accordance with the American Lumber Standard JOIST SIZE Committee Policy for Evaluation of Recommended Spans for Span Rated Decking Products (November S, The span of a joist, L, is measured from the face of 2004).Attach decking to each joist with 2-8d threaded support at one end of the joist to the face of support at nails or 248 screws. Space decking boards the other end of the joist and does not include the length approximately 1/8" apart. See Figure 11 for decking of the overhangs,Lo. Use Table 2 to determine connection requirements at the rim joist. Decking allowable joist span,LJ,based on lumber size and joist placement may range from an angle perpendicular to the spacing. Joist span, L,must be less than or equal to joists to an angle of 45 degrees to the joists. Each allowable joist span, L,. Overhang length is the lesser of segment of decking must bear on a minimum of 3 joists allowable overhang, Lo, or one fourth the joist span, L/4. (or 3 supports). See Figure 1 and Figure 2 for joist span types. Decking not meeting these requirements may be substituted when the product has been approved by the American Wood Council RESIDENTIALPRESCRIPTIVE ► ► ► DECK CONSTRUCTION GUIDE Table 2. Maximum Joist Spans and Overhangs.' Joist Spacing (o.c.) 12" 16" 24" 12" 16" 24" Species Size Allowable Span 2 LJ Allowable Overhang' L° 2x66 9'- 11" 9'-0" 7'-7" 1'-0" 1'- 1" 1'-3" 2x8 13'- 1" 11'- 10" 9'-8" 1'- 10" 2'-0" 2'-4" Southern Pine , 2x10 16'-2 14'-0 11 5 3 - 1' 3'-5' 2'- 10' 2x12 18'-0" 16'-6" 13'-6" 4'-6" 4'-2" 3'-4" 2x66 9'-6" 8'-4" 6'- 10" 0'- 11" 1'-0" 1'-2" Douglas Fir- 2x8 12'-6" 11'- 1" 9'- 1" 1'- 8" 1'- 10" 2'-2" Larch, Hem-Fir, Spruce-Pine-Fir 2x10 15'-8" 13'-7" 11'- 1" 2'- 10" 3'-2" 2'-9" 2x12 18'-0" 15'-9" 12'- 10" 4'-4" 3'- 11" 3'- 3" Redwood, 2x66 8'- 10" 8'-0" 6'- 10" 0'- 9" 0'- 10" 0'- 11" Western Cedars, 2x8 11'-8" 10'-7" 8'-8" 1'-5" 1'-7" 1'-9" Ponderosa Pines, 2x10 14'- 11" 13'-0" 10'-7" 2'- 5" 2'-7" 2'-8" Red Pine 5 2x12 17'-5" 15'- 1" 12'-4" 3'-7" T- 9" 3'- 1" 1.Assumes 40 psf live load,10 psf dead load,No.2 stress grade,and wet service conditions. 2.Assumes U360 deflection 3.Maximum allowable overhang cannot exceed U4 or''%of actual main span.Assumes,cantilever length/180 deflection with 220 lb point load(See Figure I and Figure 2). 4. Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir. 5.Design values based on northern species with no incising assumed. 6.Ledger shall be a minimum of 2x8 nominal.Where guards are required,outside joists and rim joists shall be a minimum of 2x8 nominal. 7.Joist length prescriptively limited to 18'-0"for footing design. Figure 1A. Joist Span —Joists Attached at House and Bearing Over Beam. existing wall optional overhang joist rim joist I/II-- blocking(at overhanging 11 I joists only) joist hanger ledger board beam (flush tight bearing) post L°or um joist maximum span(LsL3) overhang See Table 2 American Wood Council PRESCRIPTIVE RESIDENTIAL . . . DECK CONSTRUCTION Figure 1 B. Joist Span—Joists Attached at House and to Side of Beam. existing wall joist beam* joist hanger — ledger board *Note:beam depth must be equal to or greater than joist post depth if joist hangers are used joist span(L5Lj) See Table 2 Figure 2. Joist Span—Non-Ledger Deck. existing wall �I optional overhang optional overhang rim joist ���f blocking(at overhanging �I�I rim joist Y) Il I beam(flush tight bearing) joist beam (flush tight bearing) post post Lo or U4 I maximum joist span(L<_Lj) maximum I overhang See Table 2 overhang BEAM SIZE& ASSEMBLY REQUIREMENTS Joists shall not frame in from opposite sides of the same Deck beam spans shall be in accordance with Table 3 beam. See JOIST-TO-BEAM CONNECTION details, and can extend past the post face up to LB/4 as shown in Figure 6. Figure 3.Joists may bear on the beam and extend past Where multiple 2x members are used,the deck's beam is the beam face up to the lesser of Lo or L/4 as shown in assembled by attaching the members identified in Table Figures I and 2,or the joists may attach to the side of 3 in accordance with Figure 4 [Table R602.3(1)]. the beam with joist hangers as shown in Figure 1B. American Wood Council 6 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE Table 3A. Dimension Lumber Deck Beam Spans (LB)' for Joists Framing from One Side Only. Joist Spans (L) Less Than or Equal to: Species Size 6' 8' 10, 12' 14' 16, 18, 2-2x6 6'- 8" 5'- 8" 5'- 1" 4'-7" 4'- 3" 4'-0" 3'-9" 2-2x8 8'-6" 7'-4" 6'-6" 5'- 11" 5'-6" 5'- 1" 4'-9" 2-2x10 10'- 1" 8'-9" 7'-9" 7'- 1" 6'-6" 6'- 1" 5'-9" Southern Pine 2-2x12 11'- 11" 10'-4" 9'-2" 8'-4" T-9" 7'-3" 6'-9" 3-2x6 7'- 11" 7'-2" 6'-5" 5'- 10" 5'-5" 5'-0" 4'-9" 3-2x8 10'-7" 9'- 3" 8'- 3" 7'-6" 6- 11" 6'-5" 6'- 1" 3-2x10 12'-9" 11'- 0" 9'-9" 8'-9" 8'-3" 7'-8" 7'-3" 3-2x12 15'-0" 13'- 0" 11'-7" 10'-6" 9'-9" 9'- 1" 8'-7" 3x6or2-2x6 5'-2" 4'-5" 3'- 11" 3'-7" 3'-3" 2'- 10" 2'-6" 3x8or2-2x8 6'-7" 5'- 8" 5'- 1" 4'-7" 4'-3" T - 10" 3'- 5" Douglas Fir- 3x10 or 2-2x10 8'- 1" T- 0" 6'-3" 5'-8" 5'-3" 4'- 10" 4'-5" Larch-, Hem- 3x12 or 2-2x12 9'-5" 8'-2" 7'- 3" 6'-7" 6'- 1" 5'-8" 5'-4" Fir-, Spruce- Pine-Fir-, 4x6 6'-2 5'- 3' 4'- 8 4'- 3 T- 11" 3 -8 3-5" Redwood, 4x8 8'-2" 7'-0" 6'-3" 5'-8" 5'-3" 4'- 11" 4'-7" Western 4x10 9'-8" 8'-4" 7'-5" 6'-9" 6'-Y 6- 10" 5'-5" Cedars, 4x12 11'-2" 9'- 8" 8'-7" 7'- 10" 7'-3" 6'-9" 6'-4" Ponderosa Pine' Red 32x6 7'- 1" 6'- 5" 5'-9" 5'-3" 4'- 10" 4'-6" 4'-3" Pin,e3 3-2x8 9'- 5" 8'- 3" 7'-4" 6'-8" 6'-2" 5'-9" 5'-5" 3-2x10 11'-9" 10'-2" 9'- 1" 8'-3" 7'-7" 7'- 1" 6'-8" 3-2x12 13'-8" 11'- 10" 10'-6" 9'-7" 8'- 10" 8'-3" 7'- 10" 1.Assumes 40 psf live load, 10 psf dead load,U360 simple span beam deflection limit,cantilever length/180 deflection limit,No.2 stress grade,and wet service conditions. 2. Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir 3.Design values based on northern species with no incising assumed. 4.Beam depth must be equal to or greater than joist depth if joist hangers are used(see Figure 6,Option 3). American Wood Council . . . . Table 3B. Glued Laminated Timber Beam Spans (LB)' for Joists Framing from One Side Only. Joist Spans(L) Less Than or Equal to: Stress Class2 Width' Depth' 6' 8' 10, 12' 14' 16' 18' 9-1/2" 12'-2" 10'-6" 914" 8'-6" T-10" 7'-4" 6'-11" Balanced or 3-1/2" 11-7/8" 15'-2" 13'-l" 11'-8" 10'-8" 9'-10" 9'-2" 8'-8" Unbalanced 20E-1.5E 14" 17'-10" 15'-5" 13'-9" 12'-7" 11'-7" 10'-10" 10'-2" And Higher Grade 11-7/8" 18'-0i5 16'-8" 14'-10" 13'-7" 12'-6" 1l'-8" 11'-0" Cedar 5-1/4" 14" 18'-0i5 18'-0i5 17'-6" 16-11" 14'-9" 13'-9" 1T-0" 16" 18'-04 18'-0i5 18'-00 18'-0i5 16'-10" 15'-9" 14'-10" 9-1/2" 13'-11" 12'-1" 10'-9" 9'-10" 9'-1" 8'-6" 8'-0" 3-1/2" 11-7/8" 17'-5" 15'-1" 13'-5" 12'-3" 11'4" 10'-7" 10'-0" Unbalanced 8 Douglas Fir-Larch orr 14" 18'-04 17'-9" 16-10" 14'-5" 13'-4" 12'-6" 11'-9" Southern Pine 11-7/8" 18'-0i5 18'-0"5 17'-1" 15'-7" 14'-5" 13'-6" 12'-8" 5-1/4" 14" 18'-0"5 18'-0i5 18'-0"5 18'-0"5 17'-0" 15'-10" 14'-11" 16" 18'-011 5 18'-0"5 18'-0"5 18'-0i5 18'-0"5 18'-0"5 17'-0" 9-1/2" 13'-11" 12'-7" ll'-8" 11'-0" 10'-5" 9'-11" 9'-7" 3-1/2" 11-7/8" 17'-5" 16-10" 14'-8" 13'-9" 13'-l" 12'-6" 12'-0" Balanced 24F-1.8E 14" 18'-0"° 18'-0" 17'-4" 16'-3" 15'-5" 14'-9" 14'-2" Douglas Fir-Larch or Southern Pine 11-7/8" 18'-0"'5 18'-0 17'-4" 16'-3" 15'-5" 14'-9" 14'-2" 5-1/4" 14" 18'-0 18'-0"° 18'4i0 18'-0"° 18'-0 17'-6" 16-9" 16" 18--0i') 18'-0"' 18'-0 18'-0"' 18'-0" 18'-0" 18'-0" 1.Assumes 40 psf live load, 10 psf dead load,L/360 simple span beam deflection limit,cantilever length/180 deflection limit.Glued laminated timber shall be naturally durable or preservative treated with an oil-borne treatment in accordance with AWPA U1.See MINIMUM REQUIREMENTS&LIMITATIONS. 2.Preservative treated structural composite lumber of equal or greater capacity can be substituted. 3.Beam widths of 3-1/8"or wider can be used for the tabulated 3-1/2"width,and beam widths of 5-1/8"or wider can be used for the tabulated 5-1/4"width. 4.Beam depth must be equal to or greater than joist depth if joist hangers are used(see Figure 6,Option 3). 5.Beam span prescriptively limited to 18'-0"for footing design. Figure 3. Beam Span. joists above optional overhang(may occur at each end) IUI IVl IUI IVI IN AlI IN IAI I I I I beam beam splice at interior post post,typical locations LB/4 max. �r beam span(LB): beam span(LB): LB/4 max. f— overhang See Table 3 See Table 3 overhang American Wood Council 8 PRESCRIPTIVE RESIDENTIAL • •D DECK CONSTRUCTION Figure 4. Beam Assembly Details. 10d threaded nail or#10 wood 2 threaded nails or screws at each end or screw 23"long,staggered in splice end;splices shall be located only over �2 rows interior posts(Figure 3) r- - If a beam is constructed with 3-members, 16" attach each outside member to the inside typical member as shown here. DECK FRAMING PLAN The overall deck length shall be equal to or less than the A framing plan shows the width, length,joist and beam overall deck width. Stairs and stair landings shall not be layout;the location of the ledger board,posts,and included in determining the overall deck length or width. footings;and the type,size,and spacing of the ledger Sec Figurc 5 for an example of a typical deck framing board fasteners. plan. Figure S. Typical Deck Framing Plan. Lumber species: (see Table 1) _ _ Chimney or Bay Window _x_ledger board with%Z'dia. Y bolts/lag screws/anchors d _ (see Table 5) X a) - joist hanger: Ibs m O C O (see Table 3A) C X c n 3 - double or triple m �., �o rl trimmer hanger: Ibs Cr o, � �' o .m (see Table 7) Ue o `c Cd _X_trimmer r :o o (see Figure 35) °a a X rim joist min O N . I 6x6 post � stair stringers: cut or solid span. X m (see Figure 28) Cp E 1 J / treads: x O (see Table 6) LBA max. beam span(LB): see Table 3 single, LB/4 max. overhang overhang double, or triple_x_; LB= '-_' overall deck width: - — American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 9: JOIST-TO-BEAM CONNECTION must have a minimum capacity of 100 lbs in both uplift Each joist shall be attached to the beam as shown in and lateral load directions.Joists may also attach to the Figure 6.Joists may bear on and overhang past the beam side of the beam with joist hangers per Option 3.Joists face the lesser of Lo or L/4 when Option 1 or Option 2 is shall not frame in from opposite sides of the same beam. used to attach the joist to the beam and blocking is See JOIST HANGERS for more information.Hangers, provided between joists at beam bearing. Mechanical clips, and mechanical fasteners shall be galvanized or fasteners or hurricane clips used as shown in Option 2 stainless steel (see MINIMUM REQUIREMENTS). Figure 6. Joist-to-Beam Detail. 3-8d threaded OPTION 1 OPTION 2" OPTION 3' toe nails mechanical (2 on one side, fastener or — top of beam or 1 on the other) hurricane clip joist— ledger and joist hanger must be at same elevation U beam x C� ''see manufacturer's recommendations for additional requirements JOIST HANGERS Figure 7. Typical Joist Hangers. Joist hangers, as shown in Figure 7,shall have a depth of joist hanger with inside flanges at least 60/o of ledger or beam depth.Each hanger shall have a minimum vertical capacity in accordance with Table 3A.The joist hanger shall be selected from an ° approved manufacturer's product data based on the dimensions of the joist or header it is carrying.Joist ° hangers and fasteners shall be corrosion resistant(see ° MINIMUM REQUIREMENTS). ° Use joist hangers with inside flanges when clearances to ° the edge of the beam or ledger board dictate. Do not use ° clip angles or brackets to support joists. ° Table 3A. Joist Hanger Vertical Capacity. Joist Size Minimum Capacity, Ibs 2x6 400 2x8 500 2x10 600 2x12 700 American Wood Council POST REQUIREMENTS Figure 813. Alternate Approved Post-to-Beam All deck post sizes shall be 6x6(nominal)or larger,and Post Cap Attachment. the maximum height shall be in accordance with Table 4 and measured from grade or top of foundation, Solid sawn or __ multi-ply beam whichever is highest,to the underside of the beam. Under prescriptive limits of this document, 8x8 nominal l , posts can be substituted anywhere in Table 4 but are i 'iI limited to a maximum height of 14'-0".Posts shall be centered on footings. Cut ends and notches of posts shall 1 be field treated with an approved preservative(such as copper naphthenate) [R402.1.2].The beam shall be attached to the post by notching as shown in Figure 8A 6x6 min. f post p or by providing an approved post cap to connect the beam and post as shown in Figure 8B.All 3-ply beams ° shall be connected to the post by a post cap.All through- bolts shall have washers under the bolt head and nut. Attachment of the beam to the side of the post without notching is prohibited(see Figure 9). Figure 9. Prohibited Post-to-Beam Attachment Condition. Provide diagonal bracing parallel to the beam at each corner post greater than 2'-0"in height as shown in Figure 10. Diagonal bracing is prohibited on center posts. Bracing shall be fastened to the post at one end and the beam at the other with diameter lag screws. For non-ledger decks,(see Figure 21)diagonal bracing — Through-bolts, Note:Support of beams wl may be omitted at the beam and posts adjacent to the lag screws,or fasteners only is prohibited. house. nails. Bearing is required.See Figure 8A. Figure 8A. Post-to-Beam Attachment Requirements. (2)%2"diameter single 3"or 4" through-bolts nominal or double with washers 2"nominal beam 12" . Figure 10. Diagonal Bracing. beam must �j3 ss" Fi g g g bear fully on notched 6x6 6x6 min.— >2YF beam I ® I I a 2, l0® I I i 0 -2x4,typical (1)1/2"diameter-- lag screw with n washers,typical Typical Post At Splice DIAGONAL BRACING PARALLEL TO BEAM Note: Diagonal Bracing is prohibited on center posts. American Wood Council PRESCRIPTIVE RESIDENTIAL . . . DECK CONSTRUCTION RIM JOIST REQUIREMENTS f" ' Attach a continuous rim joist to the ends of joists as shown in Figure 11.Attach decking to the rim joist as shown in Figure 11.For more decking attachment requirements, see DECKING REQUIREMENTS. Figure 11. Rim Joist Connection Details. joists secure decking to top of rim joist with 10d threaded nails or#10 x 3" minimum wood screws @ 6"o.c. attach rim joist to end of each joist with ® (3) 10d threaded nails or(3)#10 x 3" ® minimum wood screws rim joist FOOTINGS IR4031 DECK FOOTINGS CLOSER THAN 5'-0" TO AN See Figure 12 and Table 4 for footing size, footing EXTERIOR HOUSE FOUNDATION WALL MUST thickness,and post attachment options and requirements. BEAR AT THE SAME ELEVATION AS THE All footings shall bear on undisturbed soil at least 12 FOOTING OF THE HOUSE FOUNDATION. inches below the undisturbed ground surface or below Do not construct footings over septic systems or leach the frost line, whichever is deeper. Contact the authority fields,utility lines,or enclosed meters. Contact local having jurisdiction to determine the specified frost line. utilities(call 811)before digging. Bearing conditions shall be verified in the field by the pre-manufactured post anchors shall be galvanized. See building official prior to placement of concrete. Where MINIMUM REQUIREMENTS. the building official determines that in-place soils with an allowable bearing capacity of less than 1,500 psf are likely to be present at the site,the allowable bearing capacity shall be determined by a soils investigation. l American Wood Council 12 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE Table 4. Post Height for 6x65 and Footing Sizes for all Posts. Post Heights' Footing SizeS2 m _ w IL c mM MA' co iiU V � ILI L. � C cm 0 = a° � IY N °o u_ <_10' 14' 14' 14' 14' 14' 18" 16"xl 6" 7" 6' :514' 14' 14' 14' 14' 14' 21" 18"xl8" 8" :518' 14' 14' 12' 14' 11' 24" 21"x2l" 10" :510' 14' 14' 14' 14' 14' 20" 18"xl8" 8" 8' 514' 14' 14' 14' 14' 11' 24" 21"x21" 10" 518' 14' 1 13' 1l' 1 12' 8' 1 27" 24"x24" 11" :510' 14' 14' 14' 14' 12' 23" 20"x20" 9" 10' :514' 14' 13' 11' 13' 8' 27" 24"x24" 11" :518' 12' 11' 8' 11' 2' 31" 27"x27" 13" :510 14' 14' 12' 14' 10' 25" 22"x22" 10" 12' :514' 13' 12' 9' 11' 5' 30" 26"x26" 13" :518' 11' 1 9' 6' 9' 2' 1 34" 30"00" 15" :510' 14' 13' 11' 13' 8' 27" 24"x24" l i lt 14' :514' 11' 10' 7' 10' 2' 32" 29"x29" 14" :518' 9' 8' 2' 8' NP 37" 33"x33" 16" :510' 13' 12' 10' 12' 6' 29" 26"x26" 12" 16' 514' 10' 9' 5' 9' 2' 1 35" 31"01" 15" :518' 7' 5' 2' 7' NP 40" 35"05" 18" 510' 12' 11' 8' 11' 2' 31" 27"x27" 13" 18' :514' 9' 8' 2' 8' NP 37" 33"x33" 1 16" <18' 5' 2' 1 2' 6' NP 42" 37"07" 1 19" 1.Assumes 40 psf live load, 10 psf dead load,La/4 and Lj/4 overhangs,No 2.Stress grade and wet service conditions 2.Assumes 1,500 psf soil bearing capacity and 150 pcf concrete.Value may be multiplied by 0.9 for corner posts. 3.Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir. 4.Assumes 2,500 psi compressive strength of concrete.Coordinate footing thickness with post base and anchor requirements 5.M nominal posts may be substituted anywhere in Table 4 to a maximum height of 14'. American Wood Council CONSTRUCTIONPRESCRIPTIVE RESIDENTIAL WOOD DECK Figure 12. Typical Footing Options. Cut ends of posts posts must be shall be field treated centered on footing with an approved preservative(such jz"diameter as copper rod pre-manufactured naphthenate) post base with post anchor about1� grade d J p p • ' •V 12"diameter .4 12" a < ° cons.sr 4"min. - ,d min. d ' � do a d` per _Fe 6" Table 4 g" frost depth per Table 4 per Table 4 1--i per Table 4 per Table 4 footings must bear gravel on undisturbed soil LEDGER ATTACHMENT REQUIREMENTS such as oriented strand board(OSB)or structural [R5071 composite lumber(SCL)including laminated veneer GENERAL: Attach the ledger board,which shall be lumber(LVL)—as band joists(or rim joists)that can equal to or greater than the deck joist depth but less than support the attachment of a deck(see Figure 14). or equal to the rim joist depth,to the house in However,some older homes might be constructed with accordance with Figures 14 and 15.The ledger shall be a band boards that are too thin(less than 1")to support a minimum nominal 2x8. When attachments are made to deck. In such cases,a non-ledger deck or a full plan the house band joist,the band joist shall be capable of submission is required. supporting the new deck. If this cannot be verified or MANUFACTURED WOOD TRUSS: A metal plate conditions at the house differ from the details herein, connected wood truss(MPCWT) is an engineered, then either a non-ledger deck or full plan submission is prefabricated structural component designed for each required. See NON-LEDGER DECKS. specific application. MPCWT's used in residential floors SIDING AND FLASHING: House siding or the are often installed with a 2x4 lumber"ribbon"at the exterior finish system must be removed prior to ends of the trusses(see Figure 1313)to tie the ends of the installation of the ledger board.Approved corrosion trusses together.The ribbon board,by itself, is not resistant flashing is required at any ledger board intended to support the deck ledger and deck. Installing connection to a wall of wood framed construction(see residential decks when the floor system for the house MINIMUM REQUIREMENTS).See Figure 14 for uses MPCWT requires a standard detail provided by the continuous flashing with drip edge.The threshold shall truss designer,a non-ledger deck,or a full plan be carefully flashed and caulked to prevent water submission.Refer to the Technical Note—Attachment of intrusion due to splash from the deck or melting snow Residential Deck Ledger to Metal Plate Connected and ice. Wood Truss Floor System for special blocking details and attachment requirements(www.sbcindustry.com). MANUFACTURED WOOD I-JOIST: The term"I- Joist"denotes manufactured wood"I"joists(see Figure 13A). Many new homes constructed with wood 1-joists include 1" or thicker engineered wood products(EWP)— American Wood Council 14 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE Figure 13A. Wood I-Joist Profile. Figure 13B. Metal-Plate Connected (MPC)Wood Floor Trusses with a 2x4 Lumber"Ribbon" at the Ends of the Trusses. 2x4 RIBBON BOARD-not intended for deck attachment MPC FLOOR TRUSSES i ��FOUNDATION WALL Figure 14. General Attachment of Ledger Board to Band Joist or Rim Joist. remove siding at ledger exterior sheathing prior to installation existing stud wall—- —•- threshold carefully flashed and caulked to prevent water intrusion existing 2x band joist ledger and joist flush on top or 1"minimum continuous flashing EWP rim joist extending past joist hanger 2"min. deck joist L2" "min max. min. 1/2"diameter lag 2x floor joist, screws or wood I joist, through-bolts with or MPCWT washers .• joist hanger existing wall `-2x ledger board; must be greater than or equal to the depth of the deck joist and no greater than the depth of the band joist Figure 15. Attachment of Ledger Board to Foundation Wall (Concrete or Solid Masonry). embed anchors per manufacturer recommendations to resist corrosion and decay, this area should be caulked —deck joist existing concrete or solid masonry* wall a 1/2"diameter *Note: Blocks filled approved expansion, with grout or epoxy,or adhesive concrete at anchors with washers anchor locations joist hanger for new construction 2x ledger board; must be greater than or equal to the size of the joist American Wood Council PRESCRIPTIVE RESIDENTIAL . . . DECK CONSTRUCTION GUIDE 151 PROHIBITED LEDGER ATTACHMENTS Figure 18. No Attachment to House Overhang r Attachments to exterior veneers(brick,masonry,stone), with Ledger. hollow masonry,and to cantilevered floor overhangs or bay windows are prohibited(see Figures 17 and 18). In r such cases,the non-ledger deck is required(See NON- LEDGER DECKS). - Figure 17. No Attachment to or Through Exterior Veneers(Brick, Masonry, Stone). ff I I � '1overhang �.- or bay window deck joist —brick veneer or masonry chimney LEDGER BOARD FASTENERS lumber band joist(1-'/2" actual)or EWP rim joist bearing Only those fasteners noted below are permitted. LEAD on a sill plate or wall plate shall be constructed with '/2" ANCHORS ARE PROHIBITED. lag screws or bolts with washers per Table 5 and Figure 19(see MINIMUM REQUIREMENTS). Deck ledger connection to band joist or rim joist.The connection between a deck ledger and a 2-inch nominal Table 5. Fastener Spacing for a Southern Pine, Douglas Fir-Larch, or Hem-Fir Deck Ledger or Rim Joist and a 2-inch Nominal Solid-Sawn Spruce-Pine-Fir Band Joist or EWP Rim Joist.3,4,s,6,6 (Deck Live Load =40 psf. Deck Dead Load= 10 sf Rim Joist 6'4" 6'-1" 8'-1" 1014" 12'-1" 14--1" 16--1" Joist Span or and to to to to to to Band Joist less 8'-0" 10'-0" 12'4, 14'-0" 16'-0" 18'-0" Connection Details On-Center Spacing of Fasteners „ 1 1" EWP 24" 18 14" 12" loll 9" 8" /2 diameter lag screw with 1-1/8" EWP 28" 21" 16" 14" 12" 10" 9" 15/32" maximum sheathing 1-'/2" Lumber 30" 23" 18" 15" 13" 11" loll 1" EWP 24" 18" 14" 12" 10" 9" 8" is/32"diameter bolt with 1-'/8 EWP 28" 21" 16" 14" 12" 10" 9" z maximum sheathing 1%" Lumber 36" 36" 34" 29" 24" 21" 19" '/i'diameter bolt with 1s/32, maximum sheathing and 1-%" Lumber 36" 36" 29" 24" 21" 18" 16" 1/2"stacked washers '7 1. The tip of the lag screw shall fully extend beyond the inside face of the band joist. 2. The maximum gap between the face of the ledger board and face of the wall sheathing shall be 'h". 3. Ledgers shall be flashed or caulked to prevent water from contacting the house band joist (see Figures 14 and 15). 4. Lag screws and bolts shall be staggered per Figure 19. 5. Deck ledgers shall be minimum 2x8 pressure-preservative-treated No.2 grade lumber, or other approved materials as established by standard engineering practice. 6. When solid-sawn pressure-preservative-treated deck ledgers are attached to engineered wood products (minimum 1" thick wood structural panel band joist or structural composite lumber including laminated veneer lumber), the ledger attachment shall be designed in accordance with accepted engineering practice.Tabulated values based on 300 Ibs and 350 Ibs for 1" and 1-'/8" EWP rim joist, respectively. 7. Wood structural panel sheathing, gypsum board sheathing, or foam sheathing shall be permitted between the band joist and rim joist. Stacked washers are permitted in combination with wood structural panel sheathing, but are not permitted in combination with gypsum board or foam sheathing. The maximum distance between the face of the ledger board and the face of the band joist shall be 1". 8. Fastener spacing also applies to southern pine, Douglas fir-larch, and hem-fir band joists. American Wood Council 16 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE Placement of lag screws or bolts in deck ledgers the deck ledger(see Figure 19). Proper installation of lag The lag screws or bolts shall be placed as shown in screws or bolts shall be verified by the authority having Figure 19.The lag screws or bolts shall be staggered jurisdiction. from the top to the bottom along the horizontal run of Figure 19. Ledger Board Fastener Spacing and Clearances. See Table 5 iv ` stagger fasteners See Figure 14 for rim �_ E in 2 rows g joist fastener spacing Qp © � p 5.5"*min.for 2x8 *Distance can be reduced to 4.5" 5"max. 6.5"min.for 2xl0 if lag screws are used or bolt ® p� p p� 7.5"min.for 2x12 spacing is reduced to that of lag screws to attach 2x8 ledgers to 2x8 band joists(1/2" 2"min. ledger lag screw,through-bolt,or 3/4"min. stacked washers not permitted) g anchor with washer Through-Bolts manufacturer's recommendations.All anchors must have Through-bolts shall have a diameter of%2". Pilot holes washers. for through-bolts shall be 17 /32"to 9/16" in diameter. Through-bolts require washers at the bolt head and nut. Lag Screws Lag screws shall have a diameter of/z" (see MINIMUM Expansion and Adhesive Anchors REQUIREMENTS). Lag screws may be used only when Use approved expansion or adhesive anchors when the field conditions conform to those shown in Figure attaching a ledger board to a concrete or solid masonry 14. See Figure 20 for lag screw length and shank wall as shown in Figure 15.Expansion and adhesive requirements.All lag screws shall be installed with anchor bolts shall have a diameter of Minimum washers. spacing and embedment length shall be per the Figure 20. Lag Screw Requirements. lag screws must be hot- dipped galvanized or - 1� N ' 1 ✓ stainless steel only i screw must penetrate i 1~112"shank I through length must extend 1 beyond band board r� — ' M I ���JJJ a minimum of 112" (no threads) existing band board Lag screw installation requirements: Each lag screw The threaded portion of the lag screw shall be inserted shall have pilot holes drilled as follows: 1) Drill a''/z" into the pilot hole by turning. DO NOT DRIVE LAG diameter hole in the ledger board,2) Drill a s/16" SCREWS WITH A HAMMER. Use soap or a wood- diameter hole into the band board of the house.DO NOT compatible lubricant as required to facilitate tightening. DRILL A ''/2" DIAMETER HOLE INTO THE BAND Each lag screw shall be thoroughly tightened(snug but BOARD. not over-tightened to avoid wood damage). American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 1_7-1 NON-LEDGER DECKS-FOR RESISTING ELEVATION AS THE HOUSE FOOTING IF VERTICAL LOADS LOCATED CLOSER THAN 5'-0" TO A HOUSE Non-ledger decks use the house for resisting lateral loads WALL(see Figure 2 and Figure 12). For houses with but do not utilize the exterior wall of the house to basements,a cylindrical footing(caisson)is support vertical loads(see Figure 21). Rather than recommended to minimize required excavation at the supporting the deck on a ledger, an additional beam with basement wall. Beam size is determined by Table 3. posts is provided at or within the lesser of Lo or L/4 of Non-ledger decks shall be attached to the house per the house.THE ASSOCIATED DECK POST Table 5 and Figures 22 or 23 for lateral loads. FOOTINGS SHALL BE PLACED AT THE SAME Figure 21. Non-Ledger Deck - For Resisting Vertical Loads. blocking between overhanging joists rim joist , at beam bearing rim joist joist overhang existing house foundation wall beam' eck footings must be at posts same elevation as joists existing house footing install diagonals if located closer than per Figure 10 5'-0"to house wall (dote:Tension device not shown. See provision for deck lateral forces. DECK LATERAL LOADS For non-ledger decks,blocking or framing angles can be Attachment to House: Decks shall be positively used in lieu of joist hangers and shall be provided on anchored to the primary structure [R507.I]. The lateral each side of each joist. Blocking shall be installed with connection required shall be permitted to be in 5-1 Od threaded nails into the rim joist or the framing accordance with Figure 22 or 23 for ledger and non- angle shall have a lateral capacity of 600 lb. Flashing ledger decks. Hold-down tension devices shall be over the rim joist is required and must be installed in provided in not less than two locations,and shall have an accordance with the flashing provisions in the LEDGER allowable stress design capacity of not less than 1,500 lb ATTACHMENT REQUIREMENTS. [R507.2.3]. The wall must be sheathed with minimum 3/s" wood structural panel sheathing. Use lag screws or through- bolts when fastening to a band joist; use expansion anchors or epoxy anchors when fastening to concrete or masonry.DO NOT ATTACH TO BRICK VENEERS. VERIFY THIS CONDITION IN THE FIELD PRIOR TO UTILIZING THIS METHOD. Fasteners shall penetrate beyond the house band board and be installed per Table 5. American Wood Council 'is PRESCRIPTIVE RESIDENTIAL . • • DECK CONSTRUCTION Figure 22. Lateral Load Device with Joists Parallel to Deck Joists. floor sheathing nailing at fasteners per Table 5 6"maximum on center to h joist with hold down old down or similar tension device it threaded rod,ma be sloped to, away from the house` I deck joist solid sawnJ.-I- beam&post floor joist for non-ledger decks I joist hanger J�^ (for non-ledger decks, blocking or framing angle) 36"min. e attach to 1-joist fasteners por Tablo 5 w/a min. of(19)8d nails hold down or similar tension device . . . ' t deck joist r L threaded rod,may,lbe sloped up to 1:12 minimum 2x6 x 36". away from the house 11uu11II Attached to joist web w/ - beam&post (16) 10d nails and clinch 1-joist for non-ledger decks I joist hanger (for non-ledger decks, blocking or framing angle) Figure 23. Lateral Load Device with Joists Perpendicular to Deck Joists. threaded rod,may be sloped up to 1:12 6 ft.min. �( away from the house extent of blocking attach blocking to deck w/ fasteners per Table 5 10d nails at 4"o.c.staggered hold down or similar tension device deck joist I full-depth floor joist blocking (1-joist or I -L joist hanger, beam&post solid joist) blocking, for non-ledger decks or reinforcing angle American Wood Council 0 Figure 28. Stair Stringer Requirements. Figure 29. Tread Connection Requirements. Attachment per tread at each stringer or ledger: 2x_or 5/4 treads-(2)8d threaded nails or(2)#8 screws 22-1/2"long 3x treads-(2)16d threaded nails or(2)#8 screws 2:3-1/2"long stringer - treads:2x_or 5/4 board treads:see Table 6 18"max ?i 18"max 36"max 2x4 ledgers,each side,tull depth of stringers tread;attach with(4)10d threaded nails or(4#8 wood screws>_3"long max.span=6-0" CUT STRINGER SOLID STRINGER CUT STRINGER y _ -------3 max.span SOLID STRINGER Figure 30. Stair Guard Requirements. Figure 31. Stair Stringer Attachment Detail. 6-0"maximum rim joist or.— between posts outside joist stair guard is required for -- stairs with a total rise of 30"or more; see GUARD I REQUIREMENTS for L more information sloped joist hanger, minimum vertical capacity of 625 Ibs; see JOIST HANGERS for more requirements stair guard height: 34"min. measured 0 ATTACHMENT WITH HANGERS � � from nosing of step 0 O Table 6. Minimum Tread Size for Cut and Solid Openings for required guards on the Triangular opening shall Stringers.' sides of stair treads shall not allow not permit the passage Cut Solid a sphere 4-3/8"to pass through. of a 6"diameter sphere. Species Stringer Stringer Southern Pine 2x4 or 5/4 2x8 Douglas Fir Larch, Hem-Fir,SPF2 2x4 or 5/4 2x8 or 3x4 Redwood,Western Cedars, Ponderosa Pine,3 Red Pine 2x4 or 5/4 2x10 or 3x4 1.Assumes 300 lb concentrated load,U288 deflection limit,No. 2 stress grade,and wet service conditions. 2.Incising assumed for Douglas fir-larch,hem-fir,and spruce- pine-fir. 3.Design values based on northern species with no incising assumed. American Wood Council 22 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE STAIR HANDRAIL REQUIREMENTS STAIR FOOTING REOUMMENTS IR4031 All stairs with 4 or more risers shall have a handrail on Where the stairway meets grade,attach the stringers to at least one side(see Figure 32A) [R311.7.8].The the stair guard posts as shown in Figure 34. Posts shall handrail height measured vertically from the sloped bear on footings.All footings shall bear on solid ground plane adjoining the tread nosing shall be not less than 34 and shall be placed at least 12 inches below the inches and not more than 38 inches(see Figure 30) undisturbed ground surface or below the frost line, [R311.7.8.1]. Handrails shall be graspable and shall be whichever is deeper(see Figure 34). Stringers shall bear composed of decay-resistant and/or corrosion resistant on a 2x4 bearing block attached to the post as shown. material. Handrails shall be Type I,Type II,or provide Stringers shall not bear on new or existing concrete pads equivalent graspability(see Figure 32B). Type I shall or patios that are not founded below this depth. When have a perimeter dimension of at least 4" and not greater guards are not required(see GUARD than 6-t/4".Type II rails with a perimeter greater than REQUIREMENTS),posts may terminate below the 6-'/4" shall provide a graspable finger recess area on both bottom tread elevation. Bolts are only required if a guard sides of the profile [R311.7.8.3].All shapes shall have a post is required. smooth surface with no sharp corners.Handrails shall STAIR LIGHTING REQUIREMENTS IR303.71 run continuously from a point directly over the lowest riser to a point directly over the highest riser and shall Stairways shall have a light source located at the top return to the guard at each end(see Figure 33). Handrails landing such that all stairs and landings are illuminated. may be interrupted by guard posts at a turn in the stair The light switch shall be operated from inside the house. [R311.7.8.2]. However,motion detected or timed switches are acceptable. Figure 32A. Handrail Mounting Examples. Figure 33. Miscellaneous Stair Requirements. �E a.2) Wo Fasten handrails per manufacturer recommendations X_ o 143"min. 12'min.-�{--}�— my o co 14"min L C handrail handrail shall 2x blocking return at each 12 min. 12 in.. end f 34"-38"to nosing of stairs,typical 36"min. stair width wall — - �—guard , corrosion-resistant g handrail hardware post i i MOUNTED TO GUARD MOUNTED TO WALL Figure 32B. Handrail Grip Size. Figure 34. Stair Footing Detail. 14'_24', cut post at bottom tread (2)'/2'diameter through-bolts elevation when no stair with washers required only 1 guard is required if guard is required;otherwise �4 -2 X use(2)#8 wood screws>3-'/i' 24"max. E long or(2)16d threaded nails E X E 4(8) Attach 2x4 bearing block using stair #8 wood screws>_3-1/2'long stringer or(8)16d threaded nails E 4x4 NONCIRCULAR CIRCULAR RECESSED post 5 [R311.7.7.3 Type Il [R311.7.7.3 Type III 6" E Perimeter:4"-61 Perimeter:>61' minimum frost depth 10"x10"square or 12"dia.footing American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 19 GUARD REQUIREMENTS 24.Other methods and materials may be used for guard All decks greater than 30" above grade are required to construction when approved by the authority having have a guard[R312.1] -one example is shown in Figure jurisdiction. Figure 24. Example Guard Detail. 2x2 baluster,typical 4x4 post,typical 2x6 or 5/4 board rail cap:attach to guard post with DO NOT NOTCH — 6'-0"maximum spacing (3)#12 by 3"long screws or(3)16d threaded nails with 0.148"nominal diameter 36" minimum ( 2x4 top and bottom; attach to guard post with (2)8d threaded nails or (2)#8 wood screws 22-1/2' long on inside face ®I ® ]-.--minimum nominal 2x8 rim or outside joist (2)1/2"diameter openings shall not allow attach balusters at top and bottom through-bolts the passage of a 4" with(1)#8 wood screw or(2)8d and washers diameter sphere post-frame threaded nails with 0.135"nominal diameter GUARD POST ATTACHMENTS FOR REQUIRED Figure 25. Guard posts for required guards that run GUARDS perpendicular to the deck joists shall be attached to the Deck guard posts for required guards shall be a rim joist in accordance with Figure 26. Only hold-down minimum 4x4(nominal)with an adjusted bending anchor models meeting these minimum requirements design value not less than 1,100 psi.Outside joists and shall be used. Hold-down anchors shall have a minimum rim joists to which guard posts are attached shall be a allowable tension load of 1,800 pounds for a 36" minimum of 2x8(nominal). maximum guard height and be installed in accordance with the manufacturer's instructions. Guard posts for required guards which run parallel to the deck joists shall be attached to the outside joist per Figure 26. Guard Post to Outside-Joist Example. see FIGURE 24 for guard 'guard posts can be installed as guard component attachment shown in Figure 26(between joists) g posts may be requirements if blocking is installed as shown below located on either side within 12"of each side of the post of the outside-joist at first interior bay, provide 2x blocking at guard posts guard post %' with hold-down anchors; attach blocking with 10d threaded nails top and bottom, each side (2)1/2"dia.through- outside-joist bolts and washers � min.2x8 (nom.) Alternate attachment o hold-down 2"min- lax. anchors to framing members t 2-1/2" min. and 5" max. possible per manufacturer's 2" min. - instructions_ _ outside joist--/ SECTION guard past* PLAN VIEW min. 2x8 (nom.) American Wood Council r PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE Figure 26. Guard Post to Rim Joist Example. Alternate attachment of hold-down' anchors to framing members possible per manufacturer's instructions. see FIGURE 24 for guard hold-down anchor component attachment , requirements joists guard post guard post align guard post at joist rim joist locations I min. 2x8 (nom.) I hold-down anchor rim joist joist rim joist min. 2x8 (nom.) min. 2x8 (nom.)� minimum 2 1/2" _ 12- �'01111. hold-clown anchor' diameter through- 1/2" min. and 5" max. bolts and washers - "min. at joist location between joists SECTION PLAN VIEWS STAIR REQUIREMENTS Figure 27. Tread and Riser Detail. Stairs,stair stringers,and stair guards shall meet the requirements shown in Figure 27 through Figure 34 and riser may be open,but Table 6 except where amended by the local jurisdiction. shall not allow the All stringers shall be a minimum of 2x12. Stair stringers sppheres of a a°diameter shall not span more than the dimensions shown in Figure 10"minimum 28. If the stringer span exceeds these dimensions,then a ----a sad width 4x4 post may be provided to support the stringer and riser; maximum, riser;heights a shorten its span length. The 4x4 post shall be notched not deviate from ir— risers:1x material,minimum and bolted to the stringer with(2) '/2"diameter through- one another by bolts with washers per Figure 8A.The post shall be more than 3/8" 1 1 treads:see Figure 29 and Table 6 centered on a 12" diameter or 10" square,6" thick footing. The footing shall be constructed as shown in - —sa - nosing;nosing shall l nootf d deeviate from one Figure 34 and attached to the post as shown in Figure 12. another by more than 3/8" An intermediate landing may also be provided to shorten the stringer span(see provisions below). If the total vertical height of a stairway exceeds IT-10",then an intermediate landing shall be required.All intermediate stair landings must be designed and constructed as a non-ledger deck using the details in this document. Stairs shall be a minimum of 36" in width as shown in Figure 33 [R311.7]. If only cut stringers are used, a minimum of three are required. For stairs greater than 36" in width,a combination of cut and solid stringers can be used,but shall be placed at a maximum spacing of 18" on center(see Figure 29).The width of each landing shall not be less than the width of the stairway served. Every rectangular landing shall have a minimum dimension of 36" measured in the direction of travel and no less than the width of the stairway served [R311.7]. American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 23� FRAMING AT CHIMNEY OR BAY WINDOW shown in Figure 1B. Joist hangers shall each have a All members at a chimney or bay window shall be minimum vertical capacity in accordance with Table 7. framed in accordance with Figure 35.Headers may span Bolts,screws,or lag screws used to attach the hanger to a maximum of 6-0". When a chimney or bay window is the ledger shall fully extend through the ledger into the wider than 6-0", one or more 6x6 posts may be added to 2-inch nominal lumber band joist(1-'/z" actual)or EWP reduce header spans to less than 6-0". In such cases,the rim joist.Otherwise a non-ledger deck is required. post footing must meet the requirements in the FOOTINGS section. Headers shall be located no more Table 7. Trimmer Joist Hanger Vertical Capacity. than Y-0" from the end of the trimmer joist. Joist Size Minimum Capacity, Ibs Triple trimmer joists are required on each side of the M 870 header if joist spacing is 12" or 16"o.c. or if the trimmer joist span exceeds 8'-6";otherwise,double trimmer joists 2x8 1155 are permitted.Trimmer joists may bear on the beam and 2x10 1420 extend past the beam centerline up to the lesser of Lo or L/4 as shown in Figures I and 2,or the trimmer joist 2x12 1575 may attach to the side of the beam with joist hangers as Figure 35. Detail for Framing Around a Chimney or Bay Window. a=3'-0"maximum triple joist 6'-0"maximum-1 hanger,typical decking may -- (Table 7) /^extend 6"maximum i '%i%/ - —i i� �I chimney or / chimney _ bay window ` 1 led er or ba 0 Bolts,screws, or lag board — ; screws shall fully extend into band joist or rim board triple trimmer- —double joist double header (2)'/2'diameter through-bolt joist each side` hanger, typical or lag screws at ledger* `Trimmer joist may be double if joists are spaced '*See Figure 19 for fastener spacing, 24"o.c.or if trimmer length is 8'-6"or less [edge, and end distances PLAN VIEW SECTION American Wood Council 24 PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE �1Y Or INTERNATIONAL 1742 CODECOUHCIr AMERICAN WOOD COUNCIL IR01Nl�' It is intended that this document be used in conjunction with competent design, accurate fabrication, and adequate supervision of construction. While every effort has been made to insure the accuracy of the information presented,the American Wood Council and its members do not assume responsibility for errors or omissions in the document, nor for designs, plans, or construction prepared from it. Those using this document assume all liability arising from its use. Copyright©2007, 2009, 2010, 2014 American V V%JUd "'UU i 1ii 05-14 American Wood Council CITY OF ARLINGTON �\ ` 238 N. OLYMPIC AVE -ARLINGTON, WA. 98223 PHONE; (360) 403-3551 BUILDING PERMIT Address: 19512 Knoll Drive Permit#: 1393 Parcel#:00898100006600 Valuation:200.00 OWNER APPLICANT CONTRACTOR Name:CULY CALVIN&RACHEL Name:Calvin Culy Name: Address: 19512 KNOLL DRIVE Address:19512 Knoll Drive Address: City,State Zip:EVERETT,WA 98203-4224 City,State Zip:Arlington,WA 98223 City,State Zip:, Phone: Phone:360-941-0571 Phone: MECHANICAL CONTRACTOR PLUMBING CONTRACTOR Name: Name: Address: Address: City,State,Zip: City,State,Zip: Phone: Phone: LIC#: EXP: LIC#: EXP: JOB DESCRIPTION PERMIT TYPE: Misc CODE YEAR: 2015 STORIES: CONST.TYPE: DWELLING UNITS: 0 OCC GROUP: BUILDINGS: 0 OCC LOAD: PERMIT APPROVAL I AGREE TO COMPLY WITH CITY AND STATE LAWS REGULATING CONSTRUCTION AND IN DOING THE WORK AUTHORIZED THEREBY,NO PERSON WILL BE EMPLOYED IN VIOLATION OF THE LABOR CODE OF THE STATE OF WASHINGTON RELATING TO WORKMEN'S COMPENSATION INSURANCE AND RCW 18.27. THIS APPLICATION IS NOT A PERMIT UNTIL SIGNED BY THE BUILDING OFFICIAL OR HIS/HER DEPUTY AND ALL FEES ARE PAID. IT IS UNLAWFUL TO USE OR OCCUPY A BUILDING OR STRUCTURE UNTIL A FINAL INSPECTION HAS BEEN MADE AND APPROVAL OR A CERTIFICATE OF OCCUPANCY HAS BEEN GRANTED. IBC1 I O/IRC110. SALES TAXNOTICE:Sales tax relating to construction and construction materials in the Cily�of-Ar ngton must be reported on your sales tax return fon i an code C'y of Arl* gt n#3101. - C( /'1z I I LL��! L 1-? ignature Print Name Date Re eased By Date CONDITIONS Decking replacement and railing installation. See attached Design for Code Acceptance for Decks. THIS PERMIT AUTHORIZS ONLY THE WORK NOTED.THIS PERMIT COVERS WORK TO BE DONE ON PRIVATE PROPERTY ONLY. ANY CONSTRUCTION ON THE PUBLIC DOMAIN(CURBS,SIDEWALKS,DRIVEWAYS,MARQUEES,ETC.)WILL REQUIRE SEPARATE PERMISSION. PERMIT FEES Date Description Fee Amount 3/22/2017 Building Permit Fee $32.50 3/22/2017 Building Plan Review Fee $21.13 3/22/2017 Processing/Technology Fee $25.00 3/22/2017 State Building Code Surcharge Fee $4.50 Total Due: $83.13 Total Payment: $0,00 Balance Due: $83.13 CALL FOR INSPECTIONS BUILDING(360)403-3417 When calling for an inspection please leave the following information: Permit Number,Type of Inspection being requested,and whether you prefer morning or afternoon - ° CITY OF ARLINGTON 238 N. OLYMPIC AVE -ARLINGTON, WA. 98223 PHONE; (360) 403-3551 BUILDING PERMIT Address: 19512 Knoll Drive Permit#: 1393 Parcel#:00898100006600 Valuation:200.00 OWNER APPLICANT _ CONTRACTOR Name:CULY CALVIN&RACHEL Name:Calvin Culy Name: Address: 19512 KNOLL DRIVE Address:19512 Knoll Drive Address: City,State Zip:EVERETT,WA 98203-4224 City,State Zip:Arlington,WA 98223 City,State Zip:, Phone: Phone:360-941-0571 Phone: MECHANICAL CONTRACTOR PLUMBING CONTRACTOR Name: Name: Address: Address: City,State,Zip: City,State,Zip: Phone: Phone: LIC#: EXP: LIC#: EXP: JOB DESCRIPTION PERMIT TYPE: Misc CODE YEAR: 2015 STORIES: CONST.TYPE: DWELLING UNITS: 0 OCC GROUP: BUILDINGS: 0 OCC LOAD: PERMIT APPROVAL I AGREE TO COMPLY WITH CITY AND STATE LAWS REGULATING CONSTRUCTION AND IN DOING THE WORK AUTHORIZED THEREBY;NO PERSON WILL BE EMPLOYED IN VIOLATION OF THE LABOR CODE OF THE STATE OF WASHINGTON RELATING TO WORKMEN'S COMPENSATION INSURANCE AND RCW 18.27. THIS APPLICATION IS NOT A PERMIT UNTIL SIGNED BY THE BUILDING OFFICIAL OR HIS/HER DEPUTY AND ALL FEES ARE PAID, IT IS UNLAWFUL TO USE OR OCCUPY A BUILDING OR STRUCTURE UNTIL A FINAL INSPECTION HAS BEEN MADE AND APPROVAL OR A CERTIFICATE OF OCCUPANCY HAS BEEN GRANTED. IBC110/IRC1 I0. S :Sales tax relating to construction and construction materials in the City,sf AA(ngton must be reported on your sales tax return fo an cod C' of Arl' gt n#3101. ignature Print Name Date Re eased By Date CONDITIONS Decking replacement and railing installation. See attached Design for Code Acceptance for Decks. THIS PERMIT AUTHORIZS ONLY THE WORK NOTED.THIS PERMIT COVERS WORK TO BE DONE ON PRIVATE PROPERTY ONLY. ANY CONSTRUCTION ON THE PUBLIC DOMAIN(CURBS, SIDEWALKS,DRIVEWAYS,MARQUEES,ETC.)WILL REQUIRE SEPARATE PERMISSION. PERMIT FEES Date Description Fee Amount 3/22/2017 Building Permit Fee $32.50 3/22/2017 Building Plan Review Fee $21.13 3/22/2017 Processing/Technology Fee $25.00 3/22/2017 State Building Code Surcharge Fee $4.50 Total Due: $83.13 Total Payment: $0.00 Balance Due: $83.13 CALL FOR INSPECTIONS BUILDING(360)403-3417 When calling for an inspection please leave the following information: Permit Number,Type of Inspection being requested,and whether you prefer morning or afternoon Ai r ,. I �` I I CITY OF ARLING7N, WASHINGTON --- BUILDI" DEPARTMENT No building construction shall be commenced until permit holder INSPECTION RECORD SHALL or his agent has posted this Inspection Record Card in a REMAIN AT JOB SITE conspicuous place on the premises. n OWNER: , CONTRACTOR: 1 JOB ADDRESS: VAMAI b9A OWNER ADDRESS: , / USE of BUILDING: SFR PLAT NAME: , b1 V 0 (Description of Work: \ LOT# PERMIT No: ` Sprinklered: CONDITIONS: DATE ISSUED: TYPE GROUP DEPARTMENT INSPECTION DATE DATE PASS FAIL INITIALS FOOTING BUILDING FOUNDATION 360-403-3417 UNDERFLOOR SHEARWALL PLUMBING(groundwork) GAS PIPING(groundwork) ROUGH PLUMBING ROUGH GAS PIPING ROUGH HEATING&VENTILATION FRAMING INSULATION WALLBOARD(SHEARIRATING) ROOF DRAINAGE The following documents will be required and must be available during the final inspection: Completed Public Works & Utility Inspection Card Final electrical sign off by L & I Completed Blower Door test certificate _ Completed Duct test certificate (if applicable) Conditions (if applicable *indicates that the inspection is approved but there is a minor correction FINAL INSPECTION Required Documents: CORRECTIONS (*) CITY OF ARLINGTON BUILDING DEPARTMENT APPROVED LL O FF32zI �CECOPY DA No CHANGES AUTHORIZED UNLESS APPROVED BY THE BUILDING INSPECTOR rReceived 6Lb c5 1►.LV 1 D I Id.gA 140 YTID (33V0Jq99A AP -wmmmhv-� tm m 'A �l ELMDesign Code Acceptance LE 6 q Prescriptive Residential Wood Deck construction Guide Based on theme International Residential Code guard decking ledger board- blocking— fasteners existing house floor construction 0 o � guard post ledger board attachment attachment to existing house 0 rim joist joists 0 0 beam post-to-beam connection (flush, tight bearing) footing joist-to-beam post connection Where applicable, provisions and details contained in this document are based on the International Residential Code(IRC)[bracketed text references applicable sections of the IRC]. Prescriptive construction methods recommended meet or exceed minimum requirements of the IRC. Provisions that are not found in the IRC are recommended as good industry practice.Where differences exist between provisions of this document and the IRC, provisions of the IRC shall apply.This document is not intended to preclude the use of other construction methods or materials.All construction and materials must be approved by the authority having jurisdiction. Every effort has been made to reflect the language and intent of the IRC. However, no assurance can be given that designs and construction made in accordance with this document meet the requirements of any particular jurisdiction. Copyright©2014 American Wood Council . .D DECK CONSTRUCMN CONTENTS MINIMUM REQUIREMENTS&LIMITATIONS...........2 PROHIBITED LEDGER ATTACHMENTS................... 15 DECKING REQUIREMENTS...........................................3 LEDGER BOARD FASTENERS.................................... 15 JOIST SIZE.........................................................................3 NON-LEDGER DECKS -VERTICAL LOADS............. 17 BEAM SIZE&ASSEMBLY REQUIREMENTS.............5 DECK LATERAL LOADS..............................................17 DECK FRAMING PLAN...................................................8 GUARD REQUIREMENTS............................................19 JOIST-TO-BEAM CONNECTION....................................9 GUARD POST ATTACHMENTS..................................19 JOIST HANGERS..............................................................9 STAIR REQUIREMENTS...............................................20 POST REQUIREMENTS.................................................10 STAIR HANDRAIL REQUIREMENTS.........................22 RIM JOIST REQUIREMENTS........................................I I STAIR FOOTING REQUIREMENTS............................22 FOOTINGS.......................................................................I I STAIR LIGHTING REQUIREMENTS...........................22 LEDGER ATTACHMENT REQUIREMENTS...............13 FRAMING AT CHIMNEY OR BAY WINDOW...........23 MINIMUM REOUIREMENTS&LUMTATIONS zinc-coated galvanized steel,stainless steel,silicon 1. This document applies to single level residential bronze,or copper. Hot-dipped galvanized wood decks that are attached to the house to resist fasteners shall meet the requirements of ASTMA lateral forces. [R507.2.3] 153, Standard Specification for Zinc Coating (Hot-Dip) on Iron and Steel Hardware, Class D 2. Overall deck length shall be equal to or less than for fasteners 3/8" diameter and smaller or Class C overall deck width. See DECK FRAMING PLAN for for fasteners with diameters over 3/8,,. definition of deck length and width. :•{ ■ Fasteners other than nails and timber rivets shall 3. Minimum post size is 6x6 nominal and maximum post he narmittarl to be o f mechanically deposited zinc- height N.,.. . height shall be in accordance with Table 4. coated steel with coating weights in accordance 4. All lumber shall_be identified by the grade mark of, with ASTMB 695,Class 55, minimum. or certificate of inspection issued by,an approved ■ All connectors(joist hangers, cast-in-place post lumber grading or inspection bureau or agency anchors, etc.)shall be galvanized or shall be (www.alsc.org).All lumber and glued laminated stainless steel. Hardware to be hot-dipped prior to timber shall be a naturally durable species(such as fabrication shall meet ASTMA 653, Standard Redwood or Western Cedars with 90 percent or Specification for Steel Sheet, Zinc-Coated more of the width of each side is heartwood);or be (Galvanized) or Zinc-Iron Alloy-Coated pressure preservatively treated with an approved (Galvannealed) by the Hot-Dip Process,G-185 process in accordance with American Wood coating.Hardware to be hot-dipped galvanized Protection Association standards(Table 1) [R317 after fabrication shall meet ASTMA 123, and R3181.All lumber in contact with the ground Specification for Zinc (Hot-Dip Galvanized) shall be approved preservative treated wood suitable Coatings on Iron and Steel Products. for ground contact. [R317.1.2] All cuts shall be field treated with an approved preservative(such as ' Fasteners and connectors exposed to salt water or copper naphthenate) [R402.1.2]. located within 300 feet of a salt water shoreline shall be stainless steel grade 304 or 316. 5. All nails shall meet the requirements ofASTMF 1667.Threaded nails as stated in this document • Fasteners and connectors shall be of the same include helical (spiral)and annular(ring-shank) corrosion-resistant material. nails. Wood screws shall meet the requirements of • Other coated or non-ferrous fasteners or hardware ANSEASME B18.6.1. Bolts and lag screws shall shall be as approved by the authority having meet the requirements ofANSUASME B18.2.1. jurisdiction. 6. Throughout this document, '/2" diameter bolts and 8. Decks supporting large concentrated loads such as lag screws are specified for various connections. hot tubs are beyond the scope of this document. Edge distance and spacing requirements are based 9. This document does not apply to decks which will on ''/2"diameter fasteners. If larger(or smaller) experience snow loads,snow drift loads, or sliding fasteners are specified,edge distance and spacing snow loads that exceed 40 psf. shall be adjusted. 10. Lateral load resistance is limited to the prescriptive 7. To resist corrosion,the following is required provisions of R507.2.3 of the IRC. Alternative loads [R317.3]: and detailing shall be approved by the authority • All screws,bolts, washers,nuts,and nails for use having jurisdiction. with preservative treated wood shall be hot-dipped American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTIMIN GUIDE 71 11. Flashing shall be corrosion-resistant metal [R703.8] 12. Decks shall not be used or occupied until final of minimum nominal 0.019-inch thickness or inspection and approval is obtained. approved non-metallic material.Aluminum should 13. This document is not intended to preclude the use of not be used in direct contact with lumber treated other construction methods or materials not described with preservatives that contain copper such as ACQ, herein. Copper Azole,or ACZA. Table 1. Common Species and Use Categories for Decay Resistance.' Species Above Ground Ground Contact Southern Pine X X N m Douglas Fir-Larch X X Hem-Fir X X m SPF X ZPonderosa Pine X X N Red Pine X X a� a- Redwood X X Western Cedars X Lcn Redwood X CD z o Western Cedars I X 1.Use categories listed in Table 1 are based on the American Wood Protection Association (AWPA)Book of Standards. 2.Above Ground—UC3B; Ground Contact—UC4A. 3.Naturally durable species with 90% heartwood in width on each side need not be treated per minimum requirements. DECKING REQUIREMENTS authority having jurisdiction; however,connections All decking material shall be composed of dimension equivalent to those shown for lumber or span rated lumber(2" nominal thickness)or span rated decking in decking are assumed. accordance with the American Lumber Standard JOIST SIZE Committee Policy for Evaluation of Recommended Spans for Span Rated Decking Products (November 5, The span of a joist, L, is measured from the face of 2004).Attach decking to each joist with 2-8d threaded support at one end of the joist to the face of support at nails or 248 screws. Space decking boards the other end of the joist and does not include the length approximately 1/s" apart. See Figure l 1 for decking of the overhangs,Lo. Use Table 2 to determine connection requirements at the rim joist. Decking allowable joist span,LJ,based on lumber size and joist placement may range from an angle perpendicular to the spacing.Joist span,L, must be less than or equal to joists to an angle of 45 degrees to the joists. Each allowable joist span, LJ. Overhang length is the lesser of segment of decking must bear on a minimum of 3 joists allowable overhang,Lo, or one fourth the joist span, L/4. (or 3 supports). See Figure 1 and Figure 2 for joist span types. Decking not meeting these requirements may be substituted when the product has been approved by the American Wood Council i 1 9 1111134H moil] c Table 2. Maximum Joist Spans and Overhangs.' Joist Spacing (o.c.) 12" 16" 24" 12" 16" 24" Species Size Allowable Span 2 Lj Allowable Overhangs(Lo 2x66 9'- 11" 9'-0" T-7" 1'-0" 1'- 1" 1'-3" 2x8 13'- 1" 11'- 10" 9'-8" 1'- 10" 2'-0" 2'-4" Southern Pine 2x10 16 -2" 14 -0" 11 -5 3 - 1 3'-5 2,- 10" 2x12 18'-0" 16'-6" 13'-6" 4'-6" 4'-2" 3'-4" 2x66 9'-6" 8'-4" 6'- 10" 0'- 11" 1'-0" 1'-2" Douglas Fir- 2x8 12'-6" 11'- 1" 9'- 1" 1'- 8" 1'- 10" 2'-2" Larch, Hem-Fir, Spruce-Pine-Fir 2x10 15'-8" 13'-7" 11'- 1" 2'- 10" 3'-2" 2'-9" 2x12 18'-0" 15'-9" 12'- 10" 4'-4" 3'- 11" 3'- 3" Redwood, 2x66 8'- 10" 8'-0" 6'-10" 0'-9" 0'- 10" 0'- 11" Western Cedars, 2x8 1 V-8" 10'-7" 8'-8" 1'- 5" 1'-7" 1'-9" Ponderosa Pine', 2x10 14'- 11" 13'-0" 10'-7" 2'- 5" 2'-7" 2'-8" RedPine5 2x12 17'-5" 15'- 1" 12'-4" 3'-7" 3'-9" 3'- 1" 1.Assumes 40 psf live load,10 psf dead load,No.2 stress grade,and wet service conditions. 2.Assumes U360 deflection. 3.Maximum allowable overhang cannot exceed U4 or%of actual main span.Assumes,cantilever length/180 deflection with 220 lb point load(See Figure 1A and Figure 2). 4. Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir. 5.Design values based on northern species with no incising assumed. 6.Ledger shall be a minimum of 2x8 nominal.Where guards are required,outside joists and rim joists shall be a minimum of 2x8 nominal. 7.Joist length prescriptively limited to 18'-0"for footing design. Figure 1A. Joist Span —Joists Attached at House and Bearing Over Beam. existing wall optional overhang joist rim joist I!I---- blocking(at overhanging joists only) joist hanger ledger board beam (flush tight bearing) — - post Lo or U4 maximum joist span(LsLj) overhang See Table 2 American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 5�' Figure 1B. Joist Span—Joists Attached at House and to Side of Beam. existing wall joist beam" joist hanger ledger board 'Note:beam depth must be equal to or greater than joist post �� depth if joist hangers are used joist span(LsLj) See Table �— Figure 2. Joist Span—Non-Ledger Deck. existing wall �I optional overhang �J�(��optional�overhang a� ��>�1 Intl�IlLI!J" 1�Mi I -�11_�x -K rim joist 111/ blocking (at overhanging �I!I rim joist II 1 joists only) Il beam(flush tight bearing) joist beam (flush tight bearing) post post or U4 Lo or U4 + maximum joist span(LSL�) i ice, maximum overhang See Table 2 overhang BEAM SIZE&ASSEMBLY REQUIREMENTS Joists shall not frame in from opposite sides of the same Deck beam spans shall be in accordance with Table 3 beam. See JOIST-TO-BEAM CONNECTION details, and can extend past the post face up to LB/4 as shown in Figure 6. Figure 3.Joists may bear on the beam and extend past Where multiple 2x members are used,the deck's beam is the beam face up to the lesser of Lo or L/4 as shown in assembled by attaching the members identified in Table Figures I and 2,or the joists may attach to the side of 3 in accordance with Figure 4 [Table R602.3(1)]. the beam with joist hangers as shown in Figure 1B. American Wood Council Table 3A. Dimension Lumber Deck Beam Spans (LB)' for Joists Framing from One Side Only. Joist Spans(L) Less Than or Equal to: Species Size 6' 8' 10, 12' 14' 16' 18' 2-2x6 6'-8" 5'-8" 5'- 1" 4'-7" 4'- 3" 4'-0" T-9" 2-2x8 8'-6" 7'-4" 6'-6" 5'- 11" 5'-6" 5'- 1" 4'-9" 2-2x10 10'- 1" 8'-9" T-9" 7'- 1" 6'-6" 6'- 1" 5'-9" Southern Pine 2-2x12 11'- 11" 10'-4" 9'-2" 8'-4" T-9" T-3" 6'-9" 3-2x6 T- 11" T-2" 6'- 5" 5'- 10" 5'-5" 5'-0" 4'-9" 3-2x8 10'-7" 9'-3" 8'-3" T-6" 6'- 11" 6'-5" 6'- 1" 3-2x10 12'-9" 11'-0" 9'- 9" 8'-9" 8'-3" 7'-8" T-3" 3-2x12 15'-0" 13'-0" 11'-7" 10'-6" 9'-9" 9'- 1" 8'-7" 3x6or2-2x6 5'-2" 4'-5" 3'- 11" 3'-7" 3'-3" 2'- 10" 2'-6" 3x8or2-2x8 6'-7" 5'-8" 5'- 1" 4'-7" 4'-3" 3'- 10" 3'-5" Douglas Fir- 3x10 or 2-2x10 8'- 1" T-0" 6'- 3" 5'-8" 5'-3" 4'- 10" 4'-5" Larcha, Hem- 3x12 or 2-2x12 9'-5" 8'-2" T-3" 6'-7" 6'- 1" 6- 8" 5'-4" Firz, Spruce- Pine-Fire, 4x6 6'-2" 5'-3" 4'- 8" 4'-3" 3'- 11" 3'-8" T-5" Redwood, 4x8 8'-2" T-0" 6'-3" 5'-8" 5'-3" 4'- 11" 4'-7" Western 4x10 9'-8" 8'-4" T-5" 6'- 9" 6'-3" 5'- 10" 5'-5" Cedars, 4x12 11'-2" 9'-8" 8'-7" T- 10" T-3" 6'-9" 6'-4" Ponderosa Pine 3, Red 3-2x6 7'- 1" 6'-5" 5'-9" 5'-3" 4'- 10" 4'-6" 4'-3" Pine3 3-2x8 9'- 5" 8'-3" T-4" 6'-8" 6'-2" 5'-9" 5'-5" 3-2x10 11'-9" 10'-2" 9'- 1" 8'-3" T-7" T- 1" 6'-8" 3-2x12 13'-8" 11'- 10" 10'-6" 9'-7" 8'- 10" 8'-3" 7'- 10" 1.Assumes 40 psf live load, 10 psf dead load,U360 simple span beam deflection limit,cantilever length/180 deflection limit,No.2 stress grade,and wet service conditions. 2.Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir. 3.Design values based on northern species with no incising assumed. 4.Beam depth must be equal to or greater than joist depth if joist hangers are used(see Figure 6,Option 3), American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 71 Table 3B. Glued Laminated Timber Beam Spans (LB)' for Joists Framing from One Side Only. Joist Spans(L) Less Than or Equal to: Stress ClaSS2 Width Depth 6' 8' 10, 12' 14' 16' 18' 9-1/2" 12'-2" 10'-6" 9'-4" 8'-6" 7'-10" 7'-4" 6-11" Balanced or 3-1/2" 11-7/8" 15'-2" 13'-l" 1l'-8" 10'-8" 9'-10" 9'-2" 8'-8" Unbalanced 20E-1.5E 14" 17'-10" 15'-5" 13'-9" 12'-7" 11'-7" 10'-10" 10'-2" And Higher Grade 11-718" 18'-0i5 16'-8" 14'-10" 13'-7" 12'-6" 11'4" 11'-0" Cedar 5-1/4" 14" 18'-0i5 18'-0i5 17'-6" 15'-11" 14'-9" 13'-9" 13'-0' 16" 18'-0"5 18'-0i5 18'-00 18'-0i5 16-10" 15'-9" 14'-10" 9-1/2" 13'-11" 12'-1" 10'-9" 9'-10" 9'4" 8'-6" 8'-0" 3-1/2" 11-7/8" 17'-5" 15'-l" 13'-5" 12'-3" 11'4" 10'-7" 10'-0" Unbalanced 24F-18 14" 18'-0"5 17'-9" 16-10" 14'-5" 13'-4" 12'-6" 11'-9" Douglas Fir-Larch orr Southern Pine 11-7/8" 18'-0i5 18'-0"5 17'-l" 15'-7" 14'-5" 13'-6" 12'-8" 5-1/4" 14" 18'-0i5 18'-0i5 18'-0i5 18'-0i5 17'-0" 15'-10" 14'-11" 16" 18'-0"5 18'-0"5 18'-00 18'-0"5 18'-On5 18'-0u5 17'-0" 9-1/2" 13'-11" 12'-7" 1l'-8" 11'-0" 10'-5" 9'-11" 9'-7" 3-1/2" 11-7/8" 17'-5" 15-10" 14'-8" 13'-9" 13'-1" 12'-6" 12'-0" Balanced 24F-1.8E 14" 18'-0iD 18'-0"5 17'-4" 16'-3" 15'-5" 14'-9" 14'-2" Douglas Fir-Larch or Southern Pine 11-7/8" 18'-0' 18-0 17'-4" 16-3 15-5 14-9" 14-2" 5-1/4" 14" 18'4"0 18'-0" 18'-0" 18'-0 18'-0 17'-6" 16'-9" 16" 18'-0"' 18'-0" 18'-0" 18'-0i5 18'-0" 18'-0"' 18'4"' 1.Assumes 40 psf live load, 10 psf dead load.U360 simple span beam deflection limit,cantilever length/180 deflection limit.Glued laminated timber shall be naturally durable or preservative treated with an oil-borne treatment in accordance with AWPA U1.See MINIMUM REQUIREMENTS&LIMITATIONS. 2.Preservative treated structural composite lumber of equal or greater capacity can be substituted. 3.Bearn widths of 3-1/8"or wider can be used for the tabulated 3-1/2"width,and beam widths of 5-1/8"or wider can be used for the tabulated 5-1/4"width. 4.Beam depth must be equal to or greater than joist depth if joist hangers are used(see Figure 6,Option 3). 5.Beam span prescriptively limited to 18'-0"for footing design. Figure 3. Beam Span. joists above optional overhang(may occur at each end) IVI IVI IVI 1, IVI Al inI IA Ini I I L————— —————J beam beam splice at interior post post,typical locations LB/4 max. be span(LB): beam span(LB): LB/4 max. overhang See Table 3 See Table 3 overhang American Wood Council 1 1 1 1 1 1 1 C 1 Figure 4. Beam Assembly Details. 10d threaded nail or#10 wood 2 threaded nails or screws at each end or screw a3"long, staggered in splice end;splices shall be located only over 2 rows interior posts(Figure 3) i If a beam is constructed with 3-members, 16" attach each outside member to the inside typical member as shown here. DECK FRAMING PLAN The overall deck length shall be equal to or less than the A framing plan shows the width, length,joist and beam overall deck width. Stairs and stair landings shall not be layout;the location of the ledger board,posts,and included in determining the overall deck length or width. footings;and the type,size,and spacing of the ledger See Figure 5 for an example of a typical deck framing board fasteners. plan. Figure S. Typical Deck Framing Plan. Lumber species: (see Table 1) Chimney or Bay Window _x_ledger m board with%Z"dia. Y bolts/lag screws/anchors CN @ O.C. d a) (see Table 5) N o x joist hanger:_Ibs m f O c O _ I o (see Table 3A) C u 3 double or triple r m J (V o 1 p L trimmer hanger: Ibs Cr rn � r `� `o (see Table 7) L/ FD O o to _X_trimmer L ;o o v� (see Figure 35) °a rim joist > CM �� in. —� ° I I 6x6 post / 1 stair stringers: / I / cut or solid span: _ (see Figure 28) B o 1 treads: x (see Table 6) LBA max. beam span(LB): see Table 3 single, LB/4 max. overhang overhang double,or triple_x_; LB=_'-_ -- overall deck width: American Wood Council PRESCRWIVE RESIDENTIAL WOOD DECK CONSTRUCT11UN GUIDE JOIST-TO-BEAM CONNECTION must have a minimum capacity of 100 lbs in both uplift Each joist shall be attached to the beam as shown in and lateral load directions.Joists may also attach to the Figure 6.Joists may bear on and overhang past the beam side of the beam with joist hangers per Option 3.Joists face the lesser of Lo or L/4 when Option 1 or Option 2 is shall not frame in from opposite sides of the same beam. used to attach the joist to the beam and blocking is See JOIST HANGERS for more information. Hangers, provided between joists at beam bearing.Mechanical clips,and mechanical fasteners shall be galvanized or fasteners or hurricane clips used as shown in Option 2 stainless steel(see MINIMUM REQUIREMENTS). Figure 6. Joist-to-Beam Detail. 3-8d threaded OPTION 1 OPTION 2* OPTION 3* toe nails ( mechanical —, (2 on one side, fastener or top of beam or 1 on the other) hurricane clip joist ledger and joist hanger must be at same elevation 1 beam I X� -- *see manufacturer's recommendations for additional requirements JOIST HANGERS Figure 7. Typical Joist Hangers. Joist hangers, as shown in Figure 7,shall have a depth of joist hanger with inside flanges at least 60%of ledger or beam depth.Each hanger shall have a minimum vertical capacity in accordance with Table 3A.The joist hanger shall be selected from an ° approved manufacturer's product data based on the dimensions of the joist or header it is carrying.Joist hangers and fasteners shall be corrosion resistant(see ° ° ° ° MINIMUM REQUIREMENTS). ° c ° Use joist hangers with inside flanges when clearances to ° the edge of the beam or ledger board dictate. Do not use ° clip angles or brackets to support joists. ° Table 3A. Joist Hanger Vertical Capacity. Joist Size Minimum Capacity, Ibs 2x6 400 2x8 500 2x10 600 2x12 700 i American Wood Council I Ell L­a1 1 1 1 1 POST REQUIREMENTS Figure 813. Alternate Approved Post-to-Beam All deck post sizes shall be 6x6(nominal)or larger,and Post Cap Attachment. the maximum height shall be in accordance with Table 4 and measured from grade or top of foundation, Solid sawn or whichever is highest,to the underside of the beam. ._.._ mull{-ply beam Under prescriptive limits of this document, 8x8 nominal posts can be substituted anywhere in Table 4 but are limited to a maximum height of 14'-0".Posts shall be centered on footings. Cut ends and notches of posts shall be field treated with an approved preservative(such as copper naphthenate) [R402.1.2].The beam shall be c attached to the post by notching as shown in Figure 8A p 6 min. ° I' or by providing an approved post cap to connect the st ° Il beam and post as shown in Figure 8B.All 3-ply beams ° shall be connected to the post by a post cap. All through- bolts shall have washers under the bolt head and nut. Attachment of the beam to the side of the post without notching is prohibited(see Figure 9). Figure 9. Prohibited Post-to-Beam Attachment Condition. Provide diagonal bracing parallel to the beam at each corner post greater than T-0"in height as shown in Figure 10. Diagonal bracing is prohibited on center posts. Bracing shall be fastened to the post at one end and the beam at the other with diameter lag screws. For non-ledger decks, (see Figure 21)diagonal bracing —Through-bolts, Note:Support of beams w/ may be omitted at the beam and posts adjacent to the lag screws,or fasteners only is prohibited house. nails. Bearing is required.See Figure 8A. Figure 8A. Post-to-Beam Attachment Requirements. (2)%z"diameter single 3"or 4" through-bolts nominal or double with washers 2"nominal beam beam must _ — Figure 10. Diagonal Bracing. bear fully on — j34 notched 6x6 6x6 min. > Z" Imo_ CV beam I ® I 1®401 m I t EU 0 2x4,typical (1)1/2"diameter s „ lag screw with '�4 m washers,typical Typical Post At Splice �6_ H — DIAGONAL BRACING PARALLEL TO BEAM Note:Diagonal Bracing is prohibited on center posts. American Wood Council 1 1 1 big] 1 1 1 RIM JOIST REQUIREMENTS r Attach a continuous rim joist to the ends of joists as shown in Figure 11.Attach decking to the rim joist as shown in Figure 11.For more decking attachment requirements, see DECKING REQUIREMENTS. Figure 11. Rim Joist Connection Details. joists secure decking to top of rim joist with 10d threaded nails or#10 x 3" minimum wood screws @ 6"o.c. attach rim joist to end of each joist with ® (3) 10d threaded nails or(3)#10 x 3" ® minimum wood screws rim joist FOOTINGS IR4031 DECK FOOTINGS CLOSER THAN 5'-0" TO AN See Figure 12 and Table 4 for footing size, footing EXTERIOR HOUSE FOUNDATION WALL MUST thickness,and post attachment options and requirements. BEAR AT THE SAME ELEVATION AS THE All footings shall bear on undisturbed soil at least 12 FOOTING OF THE HOUSE FOUNDATION. inches below the undisturbed ground surface or below Do not construct footings over septic systems or leach the frost line,whichever is deeper.Contact the authority fields,utility lines,or enclosed meters. Contact local having jurisdiction to determine the specified frost line. utilities(call 811) before digging. Bearing conditions shall be verified in the field by the pre-manufactured post anchors shall be galvanized. See building official prior to placement of concrete. Where MINIMUM REQUIREMENTS. the building official determines that in-place soils with an allowable bearing capacity of less than 1,500 psf are likely to be present at the site,the allowable bearing capacity shall be determined by a soils investigation. 1 American Wood Council wililill 1 161 7(6if sill1 Table 4. Post Height for 6x65 and Footing Sizes for all Posts. Post Heights' Footing SizeS2 L C C L •.r C LL C C 4) !c N d C R c a cn vai a� L � °o rn °o j' °o 2 c m E n � a - � -� 3 c c E U. r L m L — d a1i p o U. V 0 m a c m 0 = CL °o LL :510' 14' 14' 14' 14' 14' 18" 16"x16" 7" 6' 514' 14' 14' 14' 14' 14' 21" 18"x18" 8" 518' 14' 14' 12' 14' 11' 24" 21"x21" 10" :510' 14' 14' 14' 14' 14' 20" 18"x18" 1 8" 8' 514' 14' 14'- 14' 14' 11' 24" 21"x21" 10" 518' 1 14' 13' 11' 12' 8' 27" 24"x24" 11" :510' 14' 14' 14' 14' 12' 23" 20"x20" 9" 10' :514' 14' 13' 11' 13' 8' 27" 24"x24" 11" <18' 12' 11' 8' 1 11' 2' 1 31" 27"x27" 13" :510' 14' 14' 12' 14' 10' 25" 22"x22" 1011 12' :514' 13' 12' 9' 11' 5' 30" 26"x26" 1311 <18' 11' 9' 6' 9' 2' 34" 1 30"00" 1511 510' 14' 13' 11' 13' 8' 27" 24"x24" 11" 14' :514' 11' 10' 7' 10' 2' 32" 29"x29" 14" <18' 9' 8' 2' 1 81 NP 37" 33"x33" 16" :510' 13' 12' 10' 12' 6' 29" 26"x26" 12" 16' 514' 10' 9' 5' 9' 2' 35" 31"x31" 15" :518' 7' 5' 2' 7' NP 40" 1 35"05" 18" :510' 12' _11' 8' 11' 2' 31" 27"x27" 13" 18' :514' 9' 8' 2' 8' NP 37" 33"03" 1611 518' 5' 2' 1 2' 6' NP 42" 37"x37" 19" 1.Assumes 40 psf live load, 10 psf dead load,Ls/4 and Lj/4 overhangs,No 2.Stress grade and wet service conditions. 2.Assumes 1,500 psf soil bearing capacity and 150 pcf concrete.Value may be multiplied by 0.9 for corner posts. 3.Incising assumed for Douglas fir-larch,hem-fir,and spruce-pine-fir. 4.Assumes 2,500 psi compressive strength of concrete.Coordinate footing thickness with post base and anchor requirements. 5.M nominal posts may be substituted anywhere in Table 4 to a maximum height of 14'. American Wood Council r � Figure 12. Typical Footing Options. Cut ends of posts posts must be shall be field treated centered on footing with an approved preservative(such Y2"diameter _ pre-manufactured as copper rod post base naphthenate) with post anchor about 1 r�� grade • ° ° CIII in 12"diameter • a s 12„ conc.s em 4"min. min. • • de • ° ° per 6, ° e Table 4 _ 6" frost depth per Table 4�- p �--� per Table 4 Imo— � per Table 4 4" in. per Table 4 footings must bear gravel on undisturbed soil LEDGER ATTACHMENT REQUIREMENTS such as oriented strand board(OSB)or structural IR5071 composite lumber(SCL)including laminated veneer GENERAL: Attach the ledger board,which shall be lumber(LVL)—as band joists(or rim joists)that can equal to or greater than the deck joist depth but less than support the attachment of a deck(see Figure 14). or equal to the rim joist depth,to the house in However,some older homes might be constructed with accordance with Figures 14 and 15.The ledger shall be a band boards that are too thin(less than 1")to support a minimum nominal 2x8. When attachments are made to deck. In such cases,a non-ledger deck or a full plan the house band joist,the band joist shall be capable of submission is required. supporting the new deck. If this cannot be verified or MANUFACTURED WOOD TRUSS: A metal plate conditions at the house differ from the details herein, connected wood truss(MPCWT)is an engineered, then either a non-ledger deck or full plan submission is prefabricated structural component designed for each required. See NON-LEDGER DECKS. specific application. MPCWT's used in residential floors SIDING AND FLASHING: House siding or the are often installed with a 2x4 lumber"ribbon"at the exterior finish system must be removed prior to ends of the trusses(see Figure 1313)to tie the ends of the installation of the ledger board.Approved corrosion trusses together.The ribbon board,by itself, is not resistant flashing is required at any ledger board intended to support the deck ledger and deck. Installing connection to a wall of wood framed construction(see residential decks when the floor system for the house MINIMUM REQUIREMENTS).See Figure 14 for uses MPCWT requires a standard detail provided by the continuous flashing with drip edge.The threshold shall truss designer,a non-ledger deck,or a full plan be carefully flashed and caulked to prevent water submission. Refer to the Technical Note—Attachment of intrusion due to splash from the deck or melting snow Residential Deck Ledger to Metal Plate Connected and ice. Wood Truss Floor System for special blocking details and attachment requirements(www.sbcindustry.com). MANUFACTURED WOOD I-JOIST: The term"I- Joist"denotes manufactured wood"I"joists(see Figure 13A).Many new homes constructed with wood I joists include 1"or thicker engineered wood products(EWP)— American Wood Council Figure 13A. Wood I-Joist Profile. Figure 13B. Metal Plate Connected (MPC)Wood Floor Trusses with a 2x4 Lumber"Ribbon" at the Ends of the Trusses. 2x4 RIBBON BOARD-not intended for deck attachment MPG FLOOR TRUSSES FOUNDATION WALL Figure 14. General Attachment of Ledger Board to Band Joist or Rim Joist. remove siding at ledger exterior sheathing prior to installation existing stud wall threshold carefully flashed and caulked to prevent water intrusion existing 2x band joist ledger and joist flush on top or 1"minimum continuous flashing EWP rim joist extending past joist hanger 2"min. C deck joist 1-5/8"mini 5"max. 2"min 1/2"diameter lag 2x floor joist, screws or wood I joist, through-bolts with or MPCWT washers 9 • —joist hanger existing wall _ 2x ledger board; must be greater than or equal to the depth of the deck joist and no greater than the depth of the band joist Figure 15. Attachment of Ledger Board to Foundation Wall (Concrete or Solid Masonry). embed anchors per manufacturer recommendations to resist corrosion and decay, this area should be caulked deck joist existing concrete or solid masonry* wall 1/2"diameter *Note: Blocks filled approved expansion, with grout or epoxy,or adhesive concrete at anchors with washers anchor locations joist hanger for new construction —2x ledger board; must be greater than or equal to the size of the joist American Wood Council PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTIBW GUIDE is PROHIBITED LEDGER ATTACHMENTS Figure 18. No Attachment to House Overhang Attachments to exterior veneers(brick,masonry,stone), with Ledger. hollow masonry,and to cantilevered floor overhangs or bay windows are prohibited(see Figures 17 and 18). In such cases,the non-ledger deck is required(See NON- LEDGER DECKS). Figure 17. No Attachment to or Through Exterior Veneers (Brick, Masonry, Stone). overhang , i or bay i� window deck 1 joist brick veneer or masonry chimney LEDGER BOARD FASTENERS lumber band joist(1-%" actual)or EWP rim joist bearing Only those fasteners noted below are permitted. LEAD on a sill plate or wall plate shall be constructed with''h" ANCHORS ARE PROHIBITED. lag screws or bolts with washers per Table 5 and Figure 19(see MINIMUM REQUIREMENTS). ( Deck ledger connection to band joist or rim joist.The connection between a deck ledger and a 2-inch nominal Table 5. Fastener Spacing for a Southern Pine, Douglas Fir-Larch, or Hem-Fir Deck Ledger or Rim Joist and a 2-inch Nominal Solid-Sawn Spruce-Pine-Fir Band Joist or EWP Rim Joist.3,4,5,6,8 (Deck Live Load =40 psf, Deck Dead Load = 10 psf) _ Rim Joist 6'4" 6'-1" 8'-1" 10'4" 12'-1" 14'-1" 16'-1" Joist Span or and to to to to to to Band Joist less V-0" 10'-0" 12'-0" 14'-0" 16'4" 18'4" Connection Details On-Center S acin of Fasteners 1 1" EWP 24" 18" 14" 12" 10" 9" 8" diameter lag screw with 1-1/B' EWP 28" 21" 16" 14" 12" 10" 9" 15/32 maximum sheathing 1-1/z" Lumber 30" 23" 18" _ 15" 13" 11" 10" 1" EWP 24" 18" 14" 12" 10" 9" 8" 15,/z, diameter bolt with 1-1/8" EWP 28" 21" 16" 14" 12" 10" 9" /3i maximum sheathing 1%" Lumber 36" 36" 34" 29" 24" 21" 19" 1/2"diameter bolt with 75/32'maximum sheathing and 1'/s" Lumber 36" 36" 29" 24" 21" 18" 16" W stacked washers .7 1. The tip of the lag screw shall fully extend beyond the inside face of the band joist. 2. The maximum gap between the face of the ledger board and face of the wall sheathing shall be 1/2". 3. Ledgers shall be flashed or caulked to prevent water from contacting the house band joist (see Figures 14 and 15). 4. Lag screws and bolts shall be staggered per Figure 19. 5. Deck ledgers shall be minimum 2x8 pressure-preservative-treated No.2 grade lumber, or other approved materials as established by standard engineering practice. 6. When solid-sawn pressure-preservative-treated deck ledgers are attached to engineered wood products (minimum i" thick wood structural panel band joist or structural composite lumber including laminated veneer lumber), the ledger attachment shall be designed in accordance with accepted engineering practice.Tabulated values based on 300 Ibs and 350 Ibs for 1" and 1-1/8" EWP rim joist, respectively. 7. Wood structural panel sheathing, gypsum board sheathing, or foam sheathing shall be permitted between the band joist and rim joist. Stacked washers are permitted in combination with wood structural panel sheathing, but are not permitted in combination with gypsum board or foam sheathing. The maximum distance between the face of the ledger board and the face of the band joist shall be 1". 8. Fastener spacing also applies to southern pine, Douglas fir-larch, and hem-fir band joists. American Wood Council Placement of lag screws or bolts in deck ledgers the deck ledger(see Figure 19). Proper installation of lag The lag screws or bolts shall be placed as shown in screws or bolts shall be verified by the authority having Figure 19.The lag screws or bolts shall be staggered jurisdiction. from the top to the bottom along the horizontal run of Figure 19. Ledger Board Fastener Spacing and Clearances. See Table 5 z E in 2 rows�—stagger fasteners See Figure 14 for rim g joist fastener spacing Qo 0 Qo 1 5.5"*min.for 2x8 *Distance can be reduced to 4.5" 5"max. 6.5"min.for 2x10 if lag screws are used or bolt ® 0 p _ 7.5"min.for 2x12 spacing is reduced to that of lag screws to attach 2x8 2"min. lag screw,through-bolt,or ledgers to 2x8 band joists(1/2" ledger anchor with washer 3/4"min. stacked washers not permitted) Through-Bolts manufacturer's recommendations.All anchors must have Through-bolts shall have a diameter of Pilot holes washers. for through-bolts shall be "/32"to 9/16" in diameter. Through-bolts require washers at the bolt head and nut. Lag Screws Lag screws shall have a diameter of%2" (see MINIMUM Expansion and Adhesive Anchors REQUIREMENTS). Lag screws may be used only when Use approved expansion or adhesive anchors when the field conditions conform to those shown in Figure attaching a ledger board to a concrete or solid masonry 14. See Figure 20 for lag screw length and shank wall as shown in Figure 15.Expansion and adhesive requirements.All lag screws shall be installed with anchor bolts shall have a diameter of Minimum washers. spacing and embedment length shall be per the Figure 20. Lag Screw Requirements. lag screws must be hot- dipped galvanized or stainless steel only 1--r-screw must penetrate �r 3-112"shank length must extend through beyond band board a minimum of 112" (no threads) existing band board Lag screw installation requirements: Each lag screw The threaded portion of the lag screw shall be inserted shall have pilot holes drilled as follows: 1) Drill a''/z" into the pilot hole by turning.DO NOT DRIVE LAG diameter hole in the ledger board,2)Drill a 5/16" SCREWS WITH A HAMMER. Use soap or a wood- diameter hole into the band board of the house.DO NOT compatible lubricant as required to facilitate tightening. DRILL A ''/z" DIAMETER HOLE INTO THE BAND Each lag screw shall be thoroughly tightened(snug but BOARD. not over-tightened to avoid wood damage). American Wood Council ill I P NON-LEDGER DECKS-FOR RESISTING ELEVATION AS THE HOUSE FOOTING IF VERTICAL LOADS LOCATED CLOSER THAN S-0" TO A HOUSE Non-ledger decks use the house for resisting lateral loads WALL(see Figure 2 and Figure 12). For houses with but do not utilize the exterior wall of the house to basements,a cylindrical footing(caisson)is support vertical loads(see Figure 21). Rather than recommended to minimize required excavation at the supporting the deck on a ledger, an additional beam with basement wall.Beam size is determined by Table 3. posts is provided at or within the lesser of Lo or L/4 of Non-ledger decks shall be attached to the house per the house.THE ASSOCIATED DECK POST Table 5 and Figures 22 or 23 for lateral loads. FOOTINGS SHALL BE PLACED AT THE SAME Figure 21. Non-Ledger Deck - For Resisting Vertical Loads. blocking between overhanging joists rim joist I at beam bearing rim joist joist overhang existing house foundation wall `— beam, posts eck footings must be at same elevation as joists existing house footing install diagonals if located closer than per Figure 10 5-0"to house wall Note:Tension device not shown. See provision for deck lateral forces. DECK LATERAL LOADS For non-ledger decks,blocking or framing angles can be Attachment to House: Decks shall be positively used in lieu of joist hangers and shall be provided on anchored to the primary structure [R507.I].The lateral each side of each joist.Blocking shall be installed with connection required shall be permitted to be in 5-10d threaded nails into the rim joist or the framing accordance with Figure 22 or 23 for ledger and non- angle shall have a lateral capacity of 600 lb.Flashing ledger decks. Hold-down tension devices shall be over the rim joist is required and must be installed in provided in not less than two locations, and shall have an accordance with the flashing provisions in the LEDGER allowable stress design capacity of not less than 1,500 lb ATTACHMENT REQUIREMENTS. [R507.2.3]. The wall must be sheathed with minimum 3/s" wood structural panel sheathing. Use lag screws or through- bolts when fastening to a band joist; use expansion anchors or epoxy anchors when fastening to concrete or masonry.DO NOT ATTACH TO BRICK VENEERS. VERIFY THIS CONDITION IN THE FIELD PRIOR TO UTILIZING THIS METHOD. Fasteners shall penetrate beyond the house band board and be installed per Table 5. American Wood Council 1 1 0 1 7MI15471MMpf / 1 Figure 22. Lateral Load Device with Joists Parallel to Deck Joists. floor sheathing nailing at fasteners per Table 5 6"maximum on center to joist with hold down hold down or similar tension device I + III Lthreaded rod,may be sloped up to 1:12 away from the house deck joist solid sawnJ beam &post floor joist for non-ledger decks I joist hanger (for non-ledger decks, blocking or framing angle) 36"min. attach to 1-joist — fasteners per Table 5 w/a min. of(19)8d nails hold down or similar tension device deck joist threaded rod,may be sloped up to 1:12 minimum 2x6 x 36". J away from the house Attached to joist web w/ beam&post (16)10d nails and clinch 1-joist for non-ledger decks joist hanger (for non-ledger decks, blocking or framing angle) Figure 23. Lateral Load Device with Joists Perpendicular to Deck Joists. — threaded rod,may be sloped up to 1:12 6 ft.min. _I away from the house extent of blocking �I attach blocking to deck w/ fasteners per Table 5 10d nails at 4"o c.staggered - — hold down or similar tension device i deck joist } I f � full-depth —' floor joist blocking (1-joist or l joist hanger, - beam&post J' solid joist) blocking, for non-ledger decks or reinforcing angle American Wood Council Figure 28. Stair Stringer Requirements. Figure 29. Tread Connection Requirements. Attachment per tread at each stringer or ledger: 2x_or 5/4 treads-(2)8d threaded nails or(2#8 screws 2:2-1/2"long) 3x treads-(2)16d threaded nails or(2)#8 screws 21-3-1/2"long stringer treads:2x_or 5/4 board treads:see Table 6 max 18"max r' ,IA; }i 36"max ! 2x4 ledgers,each side,full depth of stringers--., tread;attach with(4)10d threaded nails or(4)#8 wood screws 23"long max.span=6'-0" CUT STRINGER SOLID STRINGER CUT STRINGER ry � max.span SOLID STRINGER Figure 30. Stair Guard Requirements. Figure 31. Stair Stringer Attachment Detail. 6'-0"maximum rim joist or-- between posts outside joist stair guard is required for stairs with a total rise of 30"or more;see GUARD _ REQUIREMENTS for more information sloped joist hanger, minimum vertical capacity of 625 Ibs; see JOIST HANGERS for more requirements stair guard height: ; o ATTACHMENT WITH HANGERS 34"min. measured 0 from nosing of step r O Table 6. Minimum Tread Size for Cut and Solid Openings for required guards on the Triangular opening shall Stringers.' sides of stair treads shall not allow not permit the passage Cut Solid a sphere 4-3/8"to pass through. of a 6"diameter sphere. Species Stringer Stringer Southern Pine 2x4 or 5/4 2x8 Douglas Fir Larch, Hem-Fir,SPF2 2x4 or 5/4 2x8 or 3x4 Redwood,Western Cedars, Ponderosa Pine,3 Red Pine3 2x4 or 5/4 2xl0 or 3x4 1.Assumes 300 lb concentrated load,U288 deflection limit,No. 2 stress grade,and wet service conditions. 2.Incising assumed for Douglas fir-larch,hem-fir,and spruce- pine-fir. 3.Design values based on northern species with no incising assumed. American Wood Council I� � STAIR HANDRAIL REQUIREMENTS STAIR I+OOTING REQUIREMENTS IR4031 All stairs with 4 or more risers shall have a handrail on Where the stairway meets grade,attach the stringers to at least one side(see Figure 32A) [R311.7.8].The the stair guard posts as shown in Figure 34. Posts shall handrail height measured vertically from the sloped bear on footings.All footings shall bear on solid ground plane adjoining the tread nosing shall be not less than 34 and shall be placed at least 12 inches below the inches and not more than 38 inches(see Figure 30) undisturbed ground surface or below the frost line, [R311.7.8.1]. Handrails shall be graspable and shall be whichever is deeper(see Figure 34). Stringers shall bear composed of decay-resistant and/or corrosion resistant on a 2x4 bearing block attached to the post as shown. material. Handrails shall be Type I, Type II,or provide Stringers shall not bear on new or existing concrete pads equivalent graspability(see Figure 32B). Type I shall or patios that are not founded below this depth. When have a perimeter dimension of at least 4" and not greater guards are not required(see GUARD than 6-1/4".Type II rails with a perimeter greater than REQUIREMENTS),posts may terminate below the 6—'/4" shall provide a graspable finger recess area on both bottom tread elevation. Bolts are only required if a guard sides of the profile [R311.7.8.3]. All shapes shall have a post is required. smooth surface with no sharp corners. Handrails shall STAIR LIGHTING REQUIREMENTS IR303.71 run continuously from a point directly over the lowest riser to a point directly over the highest riser and shall Stairways shall have a light source located at the top return to the guard at each end(see Figure 33). Handrails landing such that all stairs and landings are illuminated. may be interrupted by guard posts at a turn in the stair The light switch shall be operated from inside the house. [R311.7.8.2]. However,motion detected or timed switches are acceptable. Figure 32A. Handrail Mounting Examples. Figure 33. Miscellaneous Stair Requirements. L 2 01� U7 Fasten handrails per manufacturer recommendations _ O M OD rn 14 g"min. 12'min. p ch C 14"min L M C handrail handrail shall - 2x blocking return at each 12'min. 12" in.. end 34"-38"to nosing of stairs,typical 36"min.stair width wall corrosion-resistant —guard handrail hardware i post MOUNTED TO GUARD MOUNTED TO WALL Figure 3213. Handrail Grip Size. Figure 34. Stair Footing Detail. 141'-24' cut post at bottom tread (2)%"diameter through-bolts elevation when no stair with washers required only 11 2, guard is required if guard is required;otherwise 24"max. 4 Q use(2)#8 wood screws�3-%" _ E long or(2)16d threaded nails X 16 Attach 2x4 bearing block using min. stairk,, -(8)#8 wood screws z3'/i'long strinor(8)16d threaded nails m� •EE 4x4 NONCIRCULAR CIRCULAR RECESSED post .E [R311.7.7.3 Type q [R311.7,7.3 Type II] 6" Perimeter:4"-64' Perimeter:>61' inimum frost depth q 12"dia.footing American Wood Council GUARD REQUIREMENTS 24.Other methods and materials may be used for guard All decks greater than 30" above grade are required to construction when approved by the authority having have a guard [R312.1]-one example is shown in Figure jurisdiction. Figure 24. Example Guard Detail. —2x2 baluster,typical 4x4 post,typical— 2x6 or 5/4 board rail cap:attach to guard post with i— !6'-0"maximum spacing—r (3)012 by 3"long screws or(3)16d threaded nails DO NOT NOTCH _ with 0.148"nominal diameter 36" minimum 2x4 top and bottom; i ( ! attach to guard post with (2)8d threaded nails or (2)#8 wood screws ' long on inside face ®! ® minimum nominal 2x8 rim or outside joist (2)1/2"diameter openings shall not allow attach balusters at top and bottom through-bolts the passage of a 4" with(1)#8 wood screw or(2)8d and washers diameter sphere post-Frame threaded nails with 0.135"nominal diameter GUARD POST ATTACHMENTS FOR REQUIRED Figure 25. Guard posts for required guards that run GUARDS perpendicular to the deck joists shall be attached to the Deck guard posts for required guards shall be a rim joist in accordance with Figure 26. Only hold-down minimum 4x4(nominal)with an adjusted bending anchor models meeting these minimum requirements design value not less than 1,100 psi. Outside joists and shall be used. Hold-down anchors shall have a minimum rim joists to which guard posts are attached shall be a allowable tension load of 1,800 pounds fora 36" minimum of 2x8(nominal). maximum guard height and be installed in accordance with the manufacturer's instructions. Guard posts for required guards which run parallel to the deck joists shall be attached to the outside joist per Figure 25. Guard Post to Outside-Joist Example. see FIGURE 24 for guard *guard posts can be installed as guard posts may be component attachment shown in Figure 26 (between joists) requirements if blocking is installed as shown below located on either side within 12"of each side of the post of the outside-joist at first interior bay, provide 2x blocking at guard posts guard post with hold-down anchors; attach blocking with 10d threaded nails top and bottom, each side (2)1/2"dia.through- outside-joist bolts and washers min. 2x8 (nom.) Alternate attachment of hold-down 2"min. _ anchors to framing members 2-1/2" min.and 5"max. _ i possible per manufacturer's 2"min C instructions. guard post* � outside-joist—/ SECTION PLAN VIEW min. 2x8 (nom.) American Wood Council . . . DECK CONSTRUMN GUIDE Figure 26. Guard Post to Rim Joist Example. Alternate attachment of hold-down anchors to framing members possible per manufacturer's instructions. see FIGURE 24 for guard hold-down anchor- component attachment , \ requirements -joists guard post guard post /—align guard post at joist " r rim joist locations P i I a� min. 2x8 (nom.) N hold-down anchor Jr -rim joist joist ff—rim joist min. 2x8 (nom.) min. 2x8(nom.) minimum (2)1/2"�Mf min. -hold-down anchor diameter through- 2-1/2" min. and 5" max. bolts and washers2"min. at joist location between joists SECTION PLAN VIEWS STAIR REQUIREMENTS Figure 27. Tread and Riser Detail. Stairs,stair stringers,and stair guards shall meet the fequirenteuts shown in Figure 27 through Figure 34 and riser may be open,but Table 6 except where amended by the local jurisdiction. shall not allow the All stringers shall be a minimum of 2x12. Stair stringers spaherssae a of a a"diameter shall not span more than the dimensions shown in Figure 10"minimum-a-- --a- 28. If the stringer span exceeds these dimensions,then a tread width 4x4 post may be provided to support the stringer and 7-3/4"maximum - riser;height shall shorten its span length.The 4x4 post shall be notched not deviate from risers:1x material,minimum and bolted to the stringer with(2) %" diameter through- one another by _� - bolts with washers per Figure 8A. The post shall be more than 3/8" treads:see Figure 29 and Table e centered on a 12"diameter or 10" square,6"thick footing.The footing shall be constructed as shown in ` -3/a - nosing;nosing shall l nootf deviate from one Figure 34 and attached to the post as shown in Figure 12. another by more than 3/8" An intermediate landing may also be provided to shorten the stringer span(see provisions below). If the total vertical height of a stairway exceeds IT-0",then an intermediate landing shall be required.All intermediate stair landings must be designed and constructed as a non-ledger deck using the details in this document. Stairs shall be a minimum of 36" in width as shown in Figure 33 [R311.7]. If only cut stringers are used, a minimum of three are required. For stairs greater than 36" in width,a combination of cut and solid stringers can be used,but shall be placed at a maximum spacing of 18"on center(see Figure 29). The width of each landing shall not be less than the width of the stairway served. Every rectangular landing shall have a minimum dimension of 36" measured in the direction of travel and no less than the width of the stairway served [R311.7]. American Wood Council . . . FRAMING AT CHIMNEY OR BAY WINDOW shown in Figure 1 B.Joist hangers shall each have a All members at a chimney or bay window shall be minimum vertical capacity in accordance with Table 7. framed in accordance with Figure 35.Headers may span Bolts,screws,or lag screws used to attach the hanger to a maximum of 6-0". When a chimney or bay window is the ledger shall fully extend through the ledger into the wider than 6-0",one or more 6x6 posts may be added to 2-inch nominal lumber band joist(1-'/z" actual)or EWP reduce header spans to less than 6-0". In such cases,the rim joist. Otherwise a non-ledger deck is required. post footing must meet the requirements in the FOOTINGS section. Headers shall be located no more Table 7.Trimmer Joist Hanger Vertical Capacity. than Y-0" from the end of the trimmer joist. Joist Size Minimum Capacity, Ibs Triple trimmer joists are required on each side of the M 870 header if joist spacing is 12" or 16" o.c. or if the trimmer joist span exceeds 8'-6";otherwise,double trimmer joists 2x8 1155 are permitted. Trimmer joists may bear on the beam and 2x10 1420 extend past the beam centerline up to the lesser of Lo or L/4 as shown in Figures I and 2,or the trimmer joist 2x12 1575 may attach to the side of the beam with joist hangers as Figure 35. Detail for Framing Around a Chimney or Bay Window. a=T-0" maximum triple joist 6'-0"maximum I hanger,typical decking may (Table 7) extend 6'maximum chimney77 or / 1/ chimney rib ey bay winow ledger window D Bolts,screws, or lag f I board I screws shall fully extend into band 1X J oist or rim board r ` 1 triple trimmer double joist -double header (2)'/z'diameter through-bolt joist each side* hanger, typical or lag screws at ledger* 'Trimmer joist may be double if joists are spaced "See Figure 19 for fastener spacing, 24"o.c.or if trimmer length is 8'-6"or less I edge, and end distances PLAN VIEW SECTION American Wood Council WOOD DECK CONSTRUMN GUIDE ,�y OF FA —�Magi INTERNATIONAL 1742 CODE COUNCIr AMERICAI�iWOOD COUNCIL `�RGINl�' It is intended that this document be used in conjunction with competent design, accurate fabrication, and adequate supervision of construction. While every effort has been made to insure the accuracy of the information presented,the American Wood Council and its members do not assume responsibility for errors or omissions in the document, nor for designs, plans, or construction prepared from it.Those using this document assume all liability arising from its use. Copyright©2007, 2009, 2010, 2014 American Wood Council 05-14 American Wood Council Permit Information Date 3/22/2017 Permit Number 1393 Project Name Culy Applicant Name Calvin Culy Applicant Address 19512 Knoll Drive City, State, Zip Arrington,WA 98223 Contact Calvin Culy Phone 360-941-0571 Email contact@calvinculy.com Permit Type Misc Site Address 19512 Knoll Drive Valuation 200.00 Status Applied Permit Issued Permit Expires Square Feet 0 Type of Construction/Occupancy Load Number of Stories 0 Proposed Use Replace decking&install new railing Assigned To Launa Peterson Property . . Owner Parcel#:00898100006600 CULY CALVIN&RACHEL CULY CALVIN&RACHEL 19512 KNOLL DRIVE 19512 KNOLL DR EVERETT,WA98203-4224 AssignedReview Date T'Ype Description Target Date Completed Date To StatLIS /22/2017 isc1 P/31/2017 Fevin Olander In Review /22/2017 isc /31/2017 ick Karns n Review Uploaded Upload File Date File Uploaded By 3/22/2017 2:31:33 PM esidentfai Miscellaneous jPeterson,Launa 7c ,i RESIDENTIAL MISCELLANEOUS ( PERMIT APPLICATION Department of Community& Economic Development City of Arlington•18204 59th Ave NE•Arlington,WA 98223 • Phone(360)403-3551 RETAIINING WAION LLLS,ISTORAGE TAN S,WHEN APPLYING EQUIPMENITT,PALTERATIONS O S HOT TUBS,ETC. Project Address:19512 Knoll Dr Project Description: Restoring a back deck and rebuilding the railings. I will be building new railings that are for our baby and more enclosed. Sideways panels up to about 3 feet, sparse posts another loin and then Valuation: $200.00 Owner:Calvin Culy Address: 19512 Knoll Dr. City:Arlington State: WA Zip Code: 98223 Phone: 360-941-0571 Email: contact@calvinculy.com Contractor Name:Calvin Culy Address: 19512 Knoll Dr. City:Arlington State: WA Zip Code: 98223 Phone:360-941-0571 Email: contact@calvinculy.com License Number:n/a Expiration Date: n/a I hereby certify that the above information is correct and that the construction, installation for the above mentioned property will be in accordance with the applicable laws of the City of Arlington and the State of Washington. •�• •- 03/20/2017 Applicants Signature Date Calvin Joseph Culy Print Applicants Name .,Q FOR STAFF USE ONLY Received C�y'"LS_ _ NnAR % 4 Permit# AccepikKd Amount Received Receipt# Date Received i _ � Permit#: 1393 Permit Date: 03/22/17 Permit Type: ACCESSORY STRUCTURE Project Name: Culy Applicant Name: Calvin Culy Applicant Address: 19512 Knoll Drive Applicant, City, State, Zip: Arlington,WA 98223 Contact: Calvin Culy Phone: 360-941-0571 Email: contact@calvinculy.com Scope of Work: Replace decking & install new railing Valuation: 200.00 Square Feet: 0 Number of Stories: 0 Construction Type: Occupancy Group: ID Code: Permit Issued: 08/04/2017 Permit Expires: Form Permit Type: Status: LASERFICHE Assigned To: Launa Black Property Parcel# Address Legal Description Owner Name Owner Phone Zoning 00898100006600 19512 KNOLL DR CULY CALVIN& 111 Single Family RACHEL Residence-Detached Inspections Date Inspection Type Description Scheduled Date Completed Date Inspector Status R20.ACCESSORY Deck railings&decking 08/11/2017 STRUCTURE complete,handrail not BUILDING Approved FINAL complete at inspection. R20.ACCESSORY 03/22/2017 STRUCTURE Assigned FINAL Plan Reviews Date Review Type Description Assigned To Review Status 03/22/2017 Misc BUILDING 03/22/2017 Misc Attached deck handout for details. z.Rick Karns Fees Fee Description Notes Amount Building Permit Table 4-1 $32.50 Building Plan Review Table 4-2 $21.13 Processing/Technology $25.00 State Surcharge- 1st DU Residential- 1st Unit $4.50 Total $83.13 Attached Letters Date Letter Description 03/22/2017 Building Permit Payments Date Paid By Description Payment Type Accepted By Amount 08/04/2017 Calvin Culy 65809583 cc $83.13 Outstanding Balance $0.00 Notes Date Note Created By: 03/22/2017 Spoke with Calvin-permit is ready.-1p Launa Black Uploaded Files Date File Name 08/04/2017 2504363-1393 Approved Plans.pdf 08/04/2017 2504362-1393 Issued Permit.pdf 03/22/2017 2170293-Residential Miscellaneous CIUMFGyO85uikk.pdf Date: 03/18/2026 Permit#: 1393 Permit Date: 03/22/2017 Review Date: 03/22/2017 Permit Type: ACCESSORY STRUCTURE Review Type: Misc Target Date: 03/31/2017 Scheduled Time: 00:00 Completed Date: 03/22/2017 Description: Attached deck handout for details. Review Status: Assigned To: z.Rick Karns Time In: 00:00 Time Out: 00:00 Hours: 0.0 Property Information Parcel#: 00898100006600 CULY CALVIN & RACHEL CULY CALVIN &RACHEL 19512 KNOLL DRIVE 19512 KNOLL DR EVERETT,WA 98203-4224 Zoning: 111 Single Family Residence - DetachedLot: 66131ock: RESIDENTIAL MISCELLANEOUS { ' PERMIT APPLICATION Department of Community& Economic Development City of Arlington • 18204 59th Ave NE •Arlington,WA 98223 • Phone(360)403-3551 THIS APPLICATION IS TO BE USED WHEN APPLYING FOR INTERIOR ALTERATIONS, FENCES, RETAINING WALLS, STORAGE TANKS, PLAYGROUND EQUIPMENT, POOLS, HOT TUBS, ETC. Project Address:19512 Knoll Dr Project Description: Restoring a back deck and rebuilding the railings. I will be building new railings that are for our baby and more enclosed. Sideways panels up to about 3 feet, sparse posts another loin and then Valuation: $200.00 Owner-Calvin Cully Address: 19512 Knoll Dr. City:Arlington State: WA Zip Code: 98223 Phone. 360-941-0571 Email: contact@calvinculy.com Contractor Name-Calvin Culy Address: 19512 Knoll Dr. City:Arlington State: WA Zip Code: 98223 Phone'.360-941-0571 Email: contact@calvinculy.com License Number: n/a Expiration Date: n/a 1 hereby certify that the above information is correct and that the construction. installation for the above mentioned property will be in accordance with the applicable laws of the City of Arlington and the State of Washington. �tcCvr:�ctl�QePlze� 03/20/2017 Applicants Signature D ;te Calvin Joseph Culy Print Applicants Name FOR STAFF USE ONLY Permit 4 Accepted By Amount Received Receipt# Date Received