New Safer Truck Ladders Are Also Crash Resistant - Objective

Reduce injuries caused by slips and falls from large haulage vehicles. Approach Replace the flexible-cable or chain-type lower ladder steps, with steps that extend closer to the ground and do not sway when stepped on. Modify dimensions of entire ladder to new industry recommendations. How It Works New lower ladder steps are supported by side pieces made of pretensioned, solid-wound, coil springs fabricated from high strength steel. Unlike conventional crash-resistant steps, which flex or swing freely when stepped on, the spring supported steps can maintain the same inclination as the fixed upper portion of the ladder while supporting an average-weight operator. The steps are also highly resistant to collision damage because they yield on impact if rammed into obstructions such as rocks or berms. See photograph.