10/06/2026
Look at an aging shuttle bus and you can often read how it was built by the rust: a brown line creeping along the beltline, mid-body, where two panels meet.
Seams are where water gets in, and where buses die. A one-piece sidewall removes the seam entirely — no beltline joint to open up, no hidden corrosion starting behind the skin.
This week's Shop Note explains why seams matter and how one-piece walls change the math.
https://highlevelbus.com/shop-notes/one-piece-sidewalls/