Ramp to load and unload vehicles into and from a truck body

Abstract From the Canadian patent

A pair of longitudinally extended stringers include pins at the upper ends thereof to detachably engage apertures drilled in the open tail gate of the vehicle so that the stringers extend to the ground at approximately the same angle as the open tail gate. A plurality of cross members or rungs are secured in spaced and parallel relationship to cables, chains or the like and the lowermost cross member is bolted between the two stringers adjacent the lower ends thereof. When the stringers are secured by the upper ends into the apertures of the tail gate, the cross members are unrolled upwardly along the stringers and the uppermost cross member is then detachably secured to the stringers …