Physically, workers must be able to : Work easily and skillfully with hands; Lift and carry objects weighing up to 50 pounds; See well (either naturally or with correction); Climb and maintain balance on high ladders and scaffolds; and stand, stoop, kneel, or crouch; Completion of apprenticeship program required. Primary Purpose: Lays out, fabricates, assembles, installs, and maintains piping and piping systems, fixtures, and equipment for steam, hot water, heating, cooling, lubricating, sprinkling, and industrial processing systems.