Travelling bridge is designed according to span as Full Wall, Half Wall, Steel Profile or to avoid high wind loads as Truss Beam. Carriages, which are located at both ends of the bridge, can travel on rails with or without pinion rock or on poylurethane tyred wheels with guide wheels. The drive unit can be mounted either at the end carriages or at the middle of the bridge. Bridge movement controlled by limit switches.
For removal of settled sludge, both scraping and suction methods by pumps can be used. The solids settling in the tank are scraped or pumped to solids hopper. Also for removal of floating matter; skimming or pumping types are available. Power feed can be done by using cable carrying roller or by means of motorized or spring loaded cable drums.