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novaguy 12-11-2012 08:39 AM

Installing subfloor - edges not hitting joists
Installing attic subfloor. Truss bottom chords are 24" oc but some are not too accurate. My 4x8 subflooring is missing some of the "joists" by 1/2" or so. What is an acceptable way to fix this? Can I sister 2x6s to the bottom chords of the trusses?

joecaption 12-11-2012 08:54 AM

Before going to far with this are you even sure the trusses are rated for top loading?
Is this going to now be a conditioned area? (HVAC)
By adding plywood your cutting way down on the avalible space for insulation.

To ansewer your question, yes you can sister some 2 X 6's.

novaguy 12-11-2012 09:07 AM

Thanks. These are attic trusses rated for 40 psf LL. the attic space will be conditioned. Do i need to sister the 2x6 the entire length of the truss (from wall to wall) or can i add it just where i need it in the center section of the truss?

novaguy 12-11-2012 01:29 PM

Called truss mfg. He says I can use a 2x4, just where I need it, nailed to the 2x6 truss with 1 16d nail per foot.

joecaption 12-11-2012 04:00 PM

I'd be using a nail gun not a hammer, unless you want to do some sheetrock repairs.

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