We have to fab some caster track, the kind made from angle iron welded upside down onto flat stock. The casters on the rolling unit have V grooves to ride on the angle. I think that when we weld the angle to the flat stock, our long track is going to have an upward curve to it due to the shrinkage from the stich welding. Perhaps it will simply pull flat when we bolt it down, but I would like to try and keep it flat. We have no means of rolling it after assembly.
The plan is to prebend the pieces in the opposite direction and clamping them to hold a slight reverse curve. The stock is flexible enough that we can do this easily by letting it drape over some blocks. But, how to calculate how much bend we need?
The flat stock is 3/8" x 6" hot rolled steel, the track will be 18' long. The angle is 2" x 2" x 1/4". Right now I'm planning on a stich weld every 12".
Dennis