This manual top running crane is ideal for welding stations, assembly cells, machining centers and more. Bridge is designed to move easily under load. All structural steel, this crane is designed for heavy duty applications. Bridge lengths are 10, 15 and 20 ft. Bridge includes tagline. Standard heights under beam (HUB) are 12 and 14. Runway lengths are 10, 15 and 20 ft. lengths. Runways are easily expandable by simply removing the end stops bolting beams to columns and replacing end stops .