valhalla360 wrote:
Flatbed semi's, the beams are often cambered. If you see them running empty, the curve is easy to see but they are built for many tons of load. Far different from your average travel trailer.
I've seen a fair number of travel trailer frames and not seen cambering...at least not enough to visually see anything. They will sometimes reinforce where the axles connect but that's different from cambering.
I have only inspected the frame beam of our Forest River Salem travel trailer from the axels forward. And it most certainly is just a very thin wall, flimsy open open profile (no square tubing beam for example) simple beam. NO WELDS, no pre bending ("cambered").
I assume a heat treatmend ("welding" as some form of heat treatment, or to induce some stress on one side) would cost more (the process itself, but also multiple material cost for a steel that is suitable for such treatment) than nice stiff box beam or for that matter the entire welded steel base of the trailer.
That kind of technology (and material) may be used in some fance 100k trailer, but not in the category I have experienced.
