We used this ramp for about 10 years to load ag equipment for a charity. It is 34 ft long and 7 ft wide with 20 inch lips on each end. The top section is spring loaded and adjusts from 45 to 56 inches to accommodate different dock or container heights. We’ve had about 20,000 lbs on this with no problems. It weighed about 10,000 lbs. The axles can be pinned to raise the frame about 6 inches so the ramp can be moved around the yard.  It was loaded using a tow truck to lift one end and I backed under it.  I have a tractor and skid steer to help but they won’t lift it.