What is the floor of a shipping container made of?

A shipping container’s floor is constructed of marine grade plywood or bamboo. “Marine grade” means that the wood has more ply (19 ply or 21 ply) than traditional construction plywood, making a more stable floor that’s less prone to warping. Additionally, container floors are not smooth and have small variations with counter-sunk screw heads. Our 40-foot shipping containers include a built-in chassis tunnel, meaning there’s an approximately-10-foot-long steel plate on the non-door end of a 40-foot container.