Ceiling Diaphragm
Ceiling Diaphragm
(OP)
I am designing a garage that is 48'x60' with 16' clear. The roof members are going to be wood trusses spaced at 2'-0" o.c. The contractor decided to use OSB attached to the underside of the wood trusses to act as a diaphragm for the wall studs and gable end (actually they are going to apply OSB to the entire inside of the building, no gypsum,).
I was wondering what span rating panel I should use for the diaphragm? Since it is going to be 16' to the roof trusses, and no stairs are currently located in the structure I don't see the owner applying any vertical load to the diaphragm. I currently have a 24/16 sheathing shown on the drawings and would like to know what other people would do in this case.
I was wondering what span rating panel I should use for the diaphragm? Since it is going to be 16' to the roof trusses, and no stairs are currently located in the structure I don't see the owner applying any vertical load to the diaphragm. I currently have a 24/16 sheathing shown on the drawings and would like to know what other people would do in this case.





RE: Ceiling Diaphragm
As for the 24/16...I'd stay with that, using 1/2" nominal as a minimum thickness.
Does your dead load consider the wood as compared to gypsum?
RE: Ceiling Diaphragm
My decision, makes is sound like OSB is bad. All I am doing is trying to work with the contractor
As far as my dead load goes, I am using 25 psf, which should be enough for 2 layers of shingles, 2 layers of sheathing and the weight of the truss.
RE: Ceiling Diaphragm
RE: Ceiling Diaphragm