The Anderson Hydra Platforms trailer-mounted HP35 is a comprehensively equipped under-bridge access and work platform. The HP35 model features 180 degree platform rotation covering more than 1000 square feet of under-bridge area from a fixed point on the bridge deck. Versatility is increased by the hydra static drive, which allows bridge deck propulsion during platform use. Reversible deployment is a standard capability of all Anderson Hydra Platforms trailer-mounted models. Anderson Hydra Platforms models utilize the patented Tower Separation System, comprised of hydraulically adjustable cross-linking arms between vertical tower and the turnable sub-frame. This system enables operators to erect and extend the tower and platform over sidewalks and other barriers without restricting the under-bridge operations. These features and more are part of the commitment of Anderson Hydra Platforms to provide the utmost in safety and quality.