[LWJ]

Porsche4life is correct. Aluminum IF run in a temper that allows bending (t1 or t4 for 6063 extruded) will increase in strength and decrease in ductility over time. Don't quote me on the exact nature of this, but I used to sell considerable amount of extruded aluminum. I think you are going to ruin the ramps. Is there some way to weld/bolt extensions on that won't structurally impact the ramp? Please do not heat it. I don't recollect ever heating anything we fabricated. We did have some rolling jigs that gently slowly worked bends in the metal. Good luck. I recommend rethinking your plan. For the metal to have the strength to carry a car, it will have a low ductility. Bending = breaking.

Larry