After purchasing a expensive telescoping fiberglass ramp the Collies hate and was very heavy as well I made my own. Still have the ramp if you were closer I would give it to you.
I used 3/8 plywood and used 1x2 around the edge for strength. I put wide traction tape to cover the top. Very reasonable to build and the Collies are use to using it. I keep it in the back of the truck for storage. You can build the proper length so the ramp is not to steep as long as it will fit where you plan on storing it. This is lightweight and strong (Collies weight is 85#).
