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Attaching Deck Ledger to Rim Board
The MiTek USP WS series wood screws can be used to fasten deck ledgers to the rim board (AKA band / rim joist) of structures to meet the connection requirements of the residential building code. When installed as directed in this bulletin, the WS-HDG screws may replace the lag screws as called out in Table R507.2 of the 2015 IRC. The most common lengths for the deck ledger application are the WS35-HDG and the WS5-HDG which are 3.5" and 5" long, respectively. Order WS screws with the "-HDG" suffix to ensure you are receiving screws with the hot dipped galvanized coating suitable for exterior use.
Installation:
* Common lengths for the deck ledger application are the WS35-HDG and the WS5-HDG which are 3.5" and 5" long respectively.

* Select the proper WS screw length. The threads should have full engagement with the rim board and the tip of the screw should be protruding and visible beyond the inside face of the rim board member.
* With appropriate screw length selected, drive the screw through the ledger, sheathing, and rim board joist with a high torque variable speed drill.
* Drive screw so head is firm and flush with surface of deck ledger, but do not overdrive.
* Repeat these steps and install the appropriate 
number of screws at the prescribed edge, end 
distances, and spacing as called out in Table 1 
and Figure 1.
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