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WACs > Title 51 > Chapter 51-51 > Section 51-51-0507











51-51-0502    

51-51-0602







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WAC 51-51-0507









Section R507—Decks.










R507.2.2 Alternate deck ledger connections. Deck ledger connections not conforming to Table R507.2 shall be attached with approved fasteners having equivalent withdrawal capacity or be designed in accordance with accepted engineering practice. Girders supporting deck joists shall not be supported on deck ledgers or band joists. Deck ledgers shall not be supported on stone or masonry veneer.
R507.2.3 Deck lateral load connections. The lateral load connection required by Section R507.1 shall be permitted to be in accordance with Figure R507.2.3. Where the lateral load connection is provided in accordance with Figure R507.2.3, hold-down tension devices shall be installed in not less than two locations per deck, and each device shall have an allowable stress design capacity of not less than 1500 pounds (6672 N).

EXCEPTIONS:
1. Decks not more than 30 inches above grade at any point may be unattached.

 
2. Where a new deck is being added to an existing structure, the lateral load connection required by Section R507.1 shall be permitted to be in accordance with Figure R507.2.4.



 

Figure R507.2.4
Table 507.2.1 Placement of Lag Screws and Bolts in Deck Ledgers and Band Joists

MINIMUM END AND EDGE DISTANCES AND SPACING
BETWEEN ROWS


 
TOP
EDGE

BOTTOM
EDGE
ENDS
ROW
SPACING


Ledgera
2 inchesd
3/4 inch 2 inchesb
1 5/8 inchesb


Band joistc
3/4 inch 2 inchese
2 inchesb
1 5/8 inchesb




For SI:
1 inch = 25.4 mm.

a
Lag screws or bolts shall be staggered from the top to the bottom along the horizontal run of the deck ledger in accordance with Figure R507.2.1(1).

b
Maximum 5 inches.

c
For engineered rim joists, the manufacturer's recommendations shall govern.

d
The minimum distance from bottom row of lag screws to the top edge of the ledger shall be in accordance with Figure R507.2.1(1).

e
The 2 inches may be reduced to 3/4 inch when the band joist is directly supported by a mudsill, a header or by double top wall plates

[Statutory Authority: RCW 19.27.031 and chapters 19.27 and 34.05 RCW. WSR 13-04-068, § 51-51-0507, filed 2/1/13, effective 7/1/13.]