Works great to get my riding mower into a shed. The floor of the shed is roughly a 6 or 8 inch high off the ground.  The mower plus myself sitting on it added up to about 680lbs and it seemed pretty solid.  The only thing you have to be careful about is that the ramp is shorter than the distance between the front and back wheels of some mowers.  So when I backed into a shed and the back wheels reached the top, the front end of the ramps lifted off the ground momentarily.  This happened because the small flat plate at the top of the ramp is at parallel to the ramp.  I should bend those so they lay flat on the shed floor and then this will not happen or maybe they will bend by themselves and settle after I drive over them a few more times.