Presoriptive sidential Wood

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Presoriptive sidential Wood Page 1 THIS oocumsmr IS FOR INFORMATIONAL _1_?URPOSESgONLY _ " ' AND IS TUBE sen As A etmas ONLY Presoriptive sidential Wood Deck Construct Guides Based on the 2009 Inferna fianal Residential -Code ion guard existing house floor construction ledger board attachemeht to existing house guard post attachment t-to-beam connection pos (ft , tight bearing) ush joist-to-beam connection footing Where applicable, provisions and details contained in this document are based on the International Residential Code (IRCJ [bracketed text references applicable sections of the /RC]. 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 shalt apply. This document is not intended to preclude the use of other construction methods or materiats. All construction and materials must be approved by the authority havingjurisdiction. 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 partlcularjurtsdictlon. Copyright © 2009 American Forest St Paper Association, Inc. Page 2 Table 1. Common preset-vatigyjflir for sawnlum.l:Te_r'in_g p _ Species . - _Ac'e"-Bi'-ii 'i A Southern Pine ll _ a " ' Douglas _Flr-Larch I Ponderosa Pin: _ p , "Red . F F Rédiiiiood"i _ , ; t . . _ .3 Preservatives and _reteniion_s'listed in Table i;.ars_fbased"§en this;-Airne‘ilca’i-twoodfProteptipn"§"'. " l ii meeting iiiehe requireinents may be substituted when the product has been approved by the authority having jurisdiction. DECKING REOUTR 1' All decking material shall be conlposed ofdimension lumber (2" nominal thickness) or span rated decking in accordance with the American Lumber Standard Committee Policyfor Evaluation of Recommended -TOIST SIZE Spams for Span Rated Deciding Products filfovember 5, 2004). Attach decking to each j oist with 2-8d threaded nails or 2-#8 screws. Space decking boards approximately 1'/3" apart. See Figure ll for decking connection requirements at the rirnjoist. Decking may be placed from an angle perpendicular to the joists to an angle of45 degrees to the joists. Each segment of decking must bear on a II1i.l1il'l1l.lII1 of 4 joists (or 4 supports). The span of a joist is measured from the centerline of bearing at one end of the joist to the centerline of bearing at theother end of the joist and does not include the length of the overhangs. Use Table 2 to determine joist span based on lumber size and j oist spacing. See Figure 1 and Figure 2 for joist span types. Table 2. Maximum Joist Spans (LJJ - Joist Spacing (o.c.) Without overhangs‘ With Overhangs up to 1.142 Species Size 12" 1e" 24" -- 12" 1 e"' 24" 2><12 1s'- 0" 1e‘ -_0" 15' - 5" 1s" - 0" 1s‘ - 0" 15' - 5" 2>__ _L_e/4 rna>_<_. ' Bvernanfi 1' F‘ “ w ' overhang’ American Forest 81 Paper Association Page 5 woon DECK OONSIRUOTION GUIDE-J ; -- . Figure 4. Beam Assembly Details 10d threaded nail or#tO wood 2 threaded nails or screws at each end or splice end; splices shall be located only over screw 23" long, staggered In /\——2 rows interior posts (Figure 3)-W /L F \\\ ‘ lfa beam is constructed with 3-members, _./I 15" attach each outside member to the inside J typical ‘ member as shown here. DECK FRAMING PLAN A framing plan shows the joist and beam layout; the location of the ledger board, posts, and footings, and the type, size, and spacing of the ledger board fasteners. See Figure 5 for an example of a typical deck framing plan. Figure 5. Typical Deck Framing Plan Lumber species; (see Table 1) N rg mi _ L Ba Window i beard with n“ die. E 5; "L belie/tag screwsianchors Q : -1 T" "Y '“ "1 F‘ "1 on center fl! E 5’ ' {see Table 5) Q; ft’; :1 _ joist hanger: lbs C ii Q E dOUb|E.Ol‘ i.'Fip16 -1‘ ($89 Tabre 3A) ,2, gg $22 / _ P0?-i (see Figure 35) " trimmer hanger: lbs IQ; K -’I\ zr-.H'\‘ i ’ i ' _ i i I-'_' ' E =% “' M a ‘E . 3 3 stair stringers: J I I cut or solid L“ round or square footing: see Table 4~J ::‘FEm,_e—2'8) L514 max. (___"dEa. or ____" x ____") >< __" thick - ___“ deep L514 max. -fl—--——**II-——-ii,‘ :_ €~<-—Inn- overhang beam span (Le): see Table 3 overhang ti 95631 _... X ._ eingie, double. or triple ___ x _____; Ln = M‘ - " (599 Table 5) American Wood Council Page 6 P_RESC_RIPTlVE RE_$IDEN'l'|_Al;_WO'OD DECKCONSTRUGTIONGUIDE ' J DIST-T O-BEAM CONNECTION Eachjoist shall be attached to the beam as shown in Figure 6. Joists may bear on and overhang past the beam a maximum of L;/4. Use Option l or Option 2 to attach the joist to the beam. Option l shall only be used if the deck is attached to the house with a ledger (see LED GER ATTACHMENT REQUIREMENTS) or as shown in Figure 23. Mechanical fasteners or hurricane clips used as shown in Option 2 must have a minimum capacity of 100 lbs in both uplift and lateral load directions. Joists may also attach to the side of the beam with joist hangers per Option 3. loists shall not frame in from opposite sides of the same beam. See JOIST HANGERS for more infonnation. Hangers, clips, and mechanical fasteners shall be galvanized or stainless steel (see MINIMUM REQUIREMENTS). Figure 6: Joist-to-Beam Detail Md threaded oenon 1* canon 2“ Qencm s** toe nails l'TlBCl‘|&1[1lGa| - (2 on one Side‘ fastener or joist top of beam and joist 1 th ther hurricane clip must be at same on e 0 ) ha“9;\ Jielevation / \ E ~ =-* ~ "Option 1 . shall only he _ E used if deck °" =' -= is attached beam 6 to house _ " “ “see manufacturer's recommendations for additional requirements JOIST HANGERS Ioist hangers, as shown in Figure 7, shall each have a minimum download 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. Ioist hangers shall be galvanized or stainless steel (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. Figure. 7; Typical Joist Hangers joist hanger with inside flanges Table 3/-'\:i Joist Hanger Download Capacity Joist Size Minimum Capacity, lbs 2>< __bi .\\/Tar . ~.- stringers PESORIPTIVE RE_SIIJEN'l'lAl.' WOQD DECK CONSTRUCTION GUIDE Y 7 ' ' the stringer span (see provisions below). If the total vertical height of a stairway exceeds l2'—0", then an intermediate landing shall be required. All intennediate stair landings must be designed and constructed as a free-standing deck using the details in this document. Stairs shall he a 1'Ili11iI1111I11 of 3 6" in width as shown in Figure 33 [R31 1.7]. If only cut stringers are used, a rninirnuin 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 inaxiinurn spacing of 18" on center (see Figure 29). The width of each landing shall not he less than the width of the stairway served. Every landing shall have a nnininiuni dimension of 36" rneasured in the direction of travel and no less than the width of the stairway served [R31 1.7]. Figure 28. Stair Stringer Requirements max. span = 7‘-O" for southern pine max. span = 6’-'0" for other Table 1 specie CUT STRINGER max. span = 16'-6“ for southern pine _ i7rZ><. span = 13*-s" for other Table 1 species SOLID STRINGER Table 6. Minimum Tread Size for Cut and Solid Stringers‘ Species Cut Solid Stringer Stringer Southern Pine 2x4 or 5K4 2:-<6 Douglas Fir Larch, Hem-Fir, SPF2 2x4 or 5/4 2><4 or an 2><1o or a><4 1. Assumes 300 lb concentrated load, U288 deflection limit, No. 2 grade, and wet service conditions. 2. incising assumed for refractory species including Douglas fir- larch. hem-fir, and spruce-pine-t1'r._ 3. Design values based on northern species with no inoising assumed. American Forest & Paper Association Page 14 _ PREORIPTIVE nssml-:ri|m;|. woon user: consrncrron cums T Figure 30. Stair Guard Requirements Figure 31. Stair Stringer Attachment Detail 6‘-0" maximum between poets i stair guard is required for stairs with a total rise of 3-0“ or more; see GUARD REQUIREMENTS for more information stair guard height: 34" min. measured from nosing of step Openings for required guards on the Triangular opening shall sides of stairtreads shall not allow not permit the passage 51 Sphere 4"3i'3" Y“ P535 l|"F°U9i‘I- of e 6" diameter sphere. rim joist or outside joist ll\ I -sioped joist hanger, minimum download capacity of 625 lbs; see JOlST HANGERS for more requirements ATTACHMENT WITH HANGERS STAIR HANDRAIL REOUTREMENTS . All stairs With 4 or more risers shall have a handrail on at least one side (see Figure 32A) [R31 1.7.7]. The handrail height measured vertically from the sloped plane adjoining the tread nosing shall he not less than 34 inches and not more than 38 inches (see Figure 30) [R31 1.7.7.1]. Handrails shall be graspable and shall be composed of decay-resistant and./or corrosion resistant material. Handrails shall be Type I, Type II, or provide equivalent graspability (see Figure 32B). Type I shall have a perimeter dimension of at least 4" and not greater Figure 32A. Handrail Mounting Examples Fasten handrails per manure cturer recommendations in an minf 12 min. _-— l /-2 ['i§,“min. F3 7 i 34"-38“ to nosing of-stairs, typical wait -—-- _ _ corroer-on~resisiant handrail hardware --6---— guard ‘ poet _i i MOUNTED TO GUARD MOUNTED TO WALL than 6-‘/4". Type II rails with a perimeter greater than 6~%i" shall provide a graspable finger recess area on both sides of the profile [R31 1.7.7.3]. All shapes shall have a smooth surface with no sharp corners. Handrails shall run continuously from a point directly over the lowest riser to a point directly over the highest riser and shall return to the guard at each end (see Figure 33). Handrails may be interrupted by guard posts at a turn in the stair [R3 1 1.7.7.2]. Figure 32B. Handrail Grip Size 11- - 23" _;_ . I T235" max. :- av g :53 raw Lé "15 ' '__E _l' __._.... = “.5 Md! E NONCIRCULAR CERCULAR RECESSED {R31 3.7.7.3 Type i] [R3] l .7.7.3 Type ii] Perimeter: 4" - 6}," Perimeter: >5i" American Wood Council

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