Roof Raise Advice?
I'm in the middle of a roof raise on a Thomas 1997 School Bus. Totally new to this so I may have made some mistakes.
The hat channel extensions I ordered do not fit snug on the original hat channels. They are the same size as the original ones which I think is what most people do and it's not that the extensions should be larger.
When I clamp them on, one side or both flange out and the outer part of the hat channel does not align with the outer part of the old hat channel. I'm concerned I won't be able to drill the holes or rivet the sheet metal on as a result.
I'm using 3/4"long and 1/4" thick bolts, flat washers, lock washers and regular nuts. Should I be using lock nuts or are regular nuts okay?
Any help or advice would mean the world to me as as I'm doing this on my own.