Rocket...Had to reply before grabbin' something to eat...sure Capt will let Ya know too...'rollin' is a contractor...construction term for "setting" them in place...as in putting them up and nailing them and allll the other stuff that goes along with rolling trusses : )...we 'roll out' alot of things...and get it done 'now' cuz that's how Ya make money in that thar business!!!
Rocket,you set each end of the trusses on top of the wall then you grab a 2x4 and ROLL it thru the air to someone standing on the wall to catch the rolled truss. Unless you're Rick you just carry the suckers up there by yerself and flip em up. M-