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PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 21
<br /> Figure 28. Stair Stringer Requirements. .
<br /> Figure 29. Tread Connection Requirements.
<br /> •-,- , ' Pew tread*each stinger-Or ledger-'
<br /> 2X„,,,mal4-deeds-(2)8it1hreatied mile a screws ea-112Jong
<br /> lc tread -(2Yied''' (24fia toms23-t/2"WO
<br /> strhaer- .
<br /> II," beads:2x_or V4 le treadease Tames
<br /> saa--
<br /> .or.awe ,ri is,mm
<br /> ax 11 AO ..--
<br /> '3,„.• i ii. i . —
<br /> stringer* 2tractn:e'''artlesttai4e6t1hwvitte(484)seteWeledd"thriadecHPthitsil:
<br /> I--w ii ,....._
<br /> max.span=6'-O" CUT STRINGER SCUD STRINGER
<br /> 3
<br /> CUT STRINGER
<br /> max.span=13'-3"
<br /> SOLID STRINGER
<br /> Figure 30. Stair Guard Requirements. Figure 31. Stair Stringer Attachment Detail.
<br /> 6'4'maximum i, rim joist or—n,
<br /> Oatmeal)p..z - outsidejoist \
<br /> SW-ram-01e reqUirtgl for emeeemeeen
<br /> - liT
<br /> stairs with a total ri--.- of
<br /> 3 or more;see GUARDj ' Ili 1
<br /> REQUIREMENTS ibr
<br /> more inforilistIOO ' . . , , sloped joist hen, ger,
<br /> minimum vedroal
<br /> ,
<br /> capacity of 625 les:
<br /> ..$t 000 c see JOIST HANGERS
<br /> ,,,..--:00 for More re-gaiters:0M
<br /> stair pima height ' : , .,
<br /> 0 ATTACHMENT WITH HANGERS
<br /> Wolin.measured p •I iii
<br /> 1
<br /> frOM nosing oust%) '°* ..........;...—. '
<br /> of Alp*
<br /> wed gua , wve' , irtianotodar ,‘ shaft Table 6. Minimum Tread Size for Cut and Solid
<br /> for recai 1,..z ., op
<br /> OPollings smog Stringers.'
<br /> 'L,-....,: OtStOltireiidS Shall FAOt SHOW
<br /> not .z, ft* $,;,,,,,,•,,c1A Cut Solid
<br /> a$itiheria 44/8"-ts MS thratiga, Of a 644tainetteliptiem. Species Stringer Stringer
<br /> Southern Pine 2x4 or 5/4 2x8
<br /> Douglas Fir Larch, ..,
<br /> Hem-Fir, SPF2 2x4 or 5/4 2x8 or 3x4
<br /> Redwood,Western Cedars,
<br /> Ponderosa Pine,3 Red Pine3 2x4 or 5/4 2x10 or 3x4
<br /> 1.Assumes 300 lb concentrated load,L/288 deflection limit,No.2
<br /> stress grade,and wet service conditions.
<br /> 2. Incising assumed for Douglas fir-larch,hem-fir,and spruce-
<br /> pine-fir.
<br /> 5
<br /> 0
<br /> 3. Design values based on northern species with no incising 3) 2,
<br /> assumed.
<br /> WA-Z-L
<br /> American Wood Council
<br />
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