How to mount a deck ledger on a Larsen truss wall?

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How to mount a deck ledger on a Larsen truss wall?

We need to mount a 2x8 pressure-treated deck ledger to a conventionally framed wall that has a 8" larsen truss attached to it.

The frame is as such: 2x10 rim joist bearing upon 2x6 mudsill, 5/8" T&G OSB, 8" Larsen truss, 1x4 cross-strap, Tyvek. The deck ledger will be mounted at the same elevation as the rim joist.

The supported length of the deck is not too great, between 5-8'. I would like to attach the ledger on the same plane as th 1x4 strapping and not directly against the OSB.

Does anyone know of a detail for this? i been trying to come up with a detail where the ledger is bolted to the rim joist with long carriage bolts with squash blocks preventing the trusses from getting crushed, but I would need an elegant way of keeping the ledger spaced off the Tyvek to allow for drainage, etc.

We plan on using 1/4"-3/8" cedar lathe for the rainscreen.

Thanks again, gba.

Asked by erik olofsson
Posted Tue, 11/27/2012 - 12:53
Edited Tue, 11/27/2012 - 13:12

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