Sometimes, I use U-Haul trucks that have a loading ramp that comes out of a slot in the bed of the truck.
The problem is that because it is coming out of the slot, the ramp is about 2 inches below the bed of the truck, so when I use a dolly to move freight out of the truck, it drops down that 2" and jars the freight. Also, if one wheel drops before the other, it can actually unbalance the whole load and threaten to overturn the entire set of boxes. A few times I have almost had a stack of heavy boxes fall off the ramp because of this.
I would like to somehow construct a wedge (shown in green below) that would eliminate this 2" drop off from the bed of the truck. There are two main problems: (1) how to make the wedge itself, and (2) how to fasten it to the ramp securely so that it stays in place.
Note that I typically rent trucks only for a morning or for one day at most, so it has to be something easy to attach and detach from the ramp.