As well as climb upon the trailer when necessary (for instance, to ensure closure of dome lids following loading or unloading), also when dealing with sections of hose that may exceed 20' in length, measure as many as 4" in diameter, and weigh as much as 75 lbs. + The ability to walk, bend, reach, push, stoop, squat, as well as grasp, lift, and handle heavy equipment as necessary, to ensure safety during the hooking and dropping processes of tractor/trailer combinations.