[Jack in Alaska]

You are correct that the ladder is not of the best quality but it is sufficient for the occasional use that it gets of occasionally climbing up and down from the roof. It is made to climb up and down on the roof and that is it.
It is not a bike rack or chair hanger or flag pole holder. Not designed for that.
A bike hanging on it going down the road continuously wiggles back and forth, up & down and in and out. A flag pole does the same thing as well as chairs. That ladder just can not take that kind of abuse. Buy a bike rack that fastens to the trailer frame or a hitch on the trailer. Those are plenty strong for that use.

Now that being said..........I wish that DRV would use a little more care when installing the ladder.