We manufactured a number of Tank Retrieval Trailer Ramps in 1993 just after Desert Storm that were sold in the Middle East. Each side weighed only 230 lbs and were torsion spring assisted. The ramp was 11 ft (132") long, 20" wide. Connected to each bridge are steel grouser bars for traction . Maximum capacity of these ramps is 72 Tons, 144,000 lbs