I Have A Pole Barn That Is 4 Inches Out Of Square I Would Like To Know How To Put My Roof Trusses On So They Will Be Square So That When The Ply Wood Goes On I Don’t Have To Block It When It Does Not Fall On 4 Foot Centers.
I would say just start from the center, - - make sure it's perpendicular to one wall, - - then just work from that truss out, in both directions, - - the only ones that will be off are the ends.