... , to load and transport electromagnetic black metal materials(as steel ingot,merchant steel, pig iron );3.Some stores also use it to ... materials, pieces of iron and scrap iron, scrap steel and so on;4.The crane is consisted with box-shape bridge frame ... , compact structure, durable End girder is matched with rail buffer and rail clearance device. Crane protection grade is IP54 or IP44, Fgrade insulation ...