If you have flat trusses and are going to put a ceiling up go on 2ft centers. Makes it a lot easier for rock or plywood. Just double check the rat runs and make sure they are on two foot centers. It sucks to add blocking afterwards if they don’t know how to pull layout. I have a 4/12 pitch on my 30x52 shop and a 4/12 on my 36/60 shop. Both are rated at 140 pounds a square foot. One of the shops is two foot on center. The other is larger trusses and purlins. Will they run sheeting or skip sheeting?
