I have a detached garage that I'd like to finish the attic space to make into a office like workspace.
The garage ceiling joists are 2x8x14' (unnotched) with a 13'6" span on 16". The joist appear to be SPF but are unmarked. I suspect #2 or #3, but if #3 then I should probably increase the strength. Any good way to identify the grade?
If #3 then AWG.org reports that the L/180, w/25 psf max span is 13'6". With #2 >40psf for the span is allowed.
The attic floor would be 5/8 OSB and the garage ceiling either 1/2 drywall or OSB sheeting.
I'll post some photos shortly.