US Patent 7140821 Roll on/roll off ramp-deck transport platform

A transport platform structure which is configured for vehicle roll on/roll off has a deck having a downwardly angled sloped portion at at least one end to produce an end-edge at an end of the platform. This end edge is dimensioned to have a vertical height configured to allow wheeled vehicles to roll from a surface on which the platform is disposed, against and up over the end-edge, and onto the deck without the interposition of structures movable with respect to the deck.