Originally Posted by sojourner
I watched the videos on YouTube of the roof raise on Mudda earth's bus named "Transcendence" last evening. When he cut the roof just aft of the cab a 1/2" gap opened up due to the front of the bus fore of the axle dropping down. He jacked and blocked it up to close the gap but one has to wonder, if the body is helping hold the frame straight, what will keep it from wanting to sag after closing in the raise? Seems a bit scary, if you ask me.
Yes, and more yes.
I have jacked up and manipulated my bus's all over the place. I even removed 19 feet of bus body off of a 38 foot B700.
With the body whole, the bus will not twist. With the roof cut loose it twists easily. With no body, the rails will twist and bend.
Anyone that cuts the roof into two pieces, will suffer from movement in the body around the cut point, in a full twist situation, like driving into a ditch, or a bad angled approach.
That roof needs to stay one piece, and every support rib spliced properly.
Otherwise, good luck.