I am currently in the planning stages of a 24 x 36 workshop. I plan on having 10' ceilings with the wall studs being 16" o.c.. I'm going to build on a concrete slab foundation. I plan on using engineered trusses for the roof construction as i don't want any beams or colums in the way.I want to use room and attic trusses so that i can have a full upstairs for storage of rough lumber and junk that has appeared over the years. My question is that the attic is rated at 60 lbs. per sq. ft. @ 16" o.c... Is this enough load bearing for an attic? I just want to know what ya'll think. If not i'll do some tweaking in the design aspect of the building.