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VALIDITY OF PERMIT Ja,‘›`t--5 o C 0
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THE ISSUANCE OF A PERMIT 3)1/4‘0.,Ls,
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BASED ON CONSTRUCTION
DOCUMENTS AND OTHER (4\I;‘y i I--).f I)
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PRESCRIPTIVE RESIDENTIAL WOOD DECK CONSTRUCTION GUIDE 19
1
N,GARD REQUIREMENTS construction when approved by the authority having
All decks greater than 30" above grade are required to jurisdiction.
have a guard[R312.1] -one example is shown in Figure
24. Other methods and materials may be used for guard
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'-O"maximum spacing /with(3)#12 by 3"long screws or(3)16d threaded nails
0.148"nominal diameter
t 111111 ....iiiiIiii
. a, im
36"
minimum0 2x4 top and bottom;
attach to guard post with
(2)8d threaded nails or
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.1•5��C� g` K irl idui (2)#8 wood screws Z2-%"
long on inside face
■ minimum nominal 2x8
ii:iii ,® rim or outside joist
(2)1/2"diameter , attach balusters at top and ottom
through-bolts openings shall not allow with(1)#8 passage of a 4" 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. Joists and rim joists shall be used. Hold-down anchors shall have a minimum
to which guard posts are attached shall be a minimum of allowable tension load of 1,800 pounds for a 36"
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.
sw-� see FIGURE 24 for guard *guard posts can be installed as
guard posts may be :' component attachment shown in Figure 26 (between joists)
located on either side requirements if blocking is installed as shown below
of the outside-joist within 12"of each side of the post
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-
bolts and washers outside-joist
min. 2x8(nom.)
■III nfor Alternate attachment of hold-down Li
2"min. n ; : -
, anchors to framing members ..
2-1/2"min.and 5"max. �.��'' ( possible per manufacturer's
2"min. - a. 1 instructions.
outside joist SECTION guard post"' PLAN VIEW
min.2x8(nom.)
American Wood Council
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