A 37.5-ton capacity mill duty coil grab has been installed beneath the hook of a 40-ton capacity overhead crane at a Monarch Steel Company, Inc. facility in Decatur, AL.
The coil grab was manufactured by The Caldwell Group, a Rockford, Illinois-based company that specializes in both standard and custom lifting equipment. Mazzella Companies, a Caldwell Group distributor, provided the coil grab to the Monarch steel service center, located in Decatur in northern Alabama.
The grab replaced a previous coil grab that had become damaged over time; the facility opened in 2004. It is rigged below a 92-ft. span top-running double-girder crane, with a single hoist, manufactured by Zenar. The grab carries coils from the processing machine to a floor storage area, over a distance between 100 ft. and 200 ft.
The team from Mazzella said: “The crane has a standard hook block, but there is a scale system between the block and hook. The hook-scale assembly is used to monitor the weight of the coils being lifted. The crane and grab are operated by a single operator in a standing position, using radio remote control.”
They explained that the coils are typically the same size but do vary in dimensions and weigh up to a maximum of 75,000 lb. (37.5 ton). The maximum outer diameter is 80 in., while the largest inner diameter is 20 in. Coil widths range from 25.5 in. to 76 in.