I was watching a guy at BJ's unload my trailer, with a standup lift. He had picked up a double stacked pallet and when it got to the rollup door, it caused it to go backward in the track, which caused the far end to start downward, just about the time the forklift got to that point. Happened so quickly, I couldn't stop him.
One wasted door on a brand new trailer. OH WELL, they don't last as long as they used to.
David from jax