Top roller chain is used primarily in the automotive and precision equipment industries for free flow conveyance. It is based on the standard chain with extended side plates. These are installed on the pins that connect SK-1 extended plates. Pallets with conveyed objects are loaded on the top rollers. They are made up of stainless steel, carbon steel, or plated carbon steel. These are available with R-rollers and with S-rollers. R-rollers is preferred, especially with the condition that overall length of the equipment is more than 10 m and the chain speed is more than 20 m/min. It has the feature of high maximum allowable tension and economical cost.
Top Running Singler Girder Cranes consists of a single girder mounted on top of two end trucks that span the width of a building and have a hoist running on the lower flange of a structural shapes girder. These cranes normally have capacities up to 20 tons and spans up to 60 feet. These are normally operated from the floor by a pendant station that travels with the hoist across the span of the structural shape girder. The single-girder, top-running crane is very economical for light to moderate service.