The construction metal worker is responsible for fabricating ducts for high efficiency heating, ventilating, and air conditioning (HVAC) systems to maximize efficiency of systems; fastening seams or joints together with welds, bolts, cement, rivets, solder, caulks, metal drive clips, or bonds to assemble components into products or to repair sheet metal items; installing plumbing or piping; trimming, file, grind, deburr, buff, or smooth surfaces, seams, or joints of assembled parts, using hand tools or portable power tools; welding metal components; finishing parts, using hacksaws or hand, rotary, or squaring shears; cleaning or preparing construction sites to eliminate possible hazard; measuring, marking, or recording openings or distances to layout areas where construction work will be performed; reading plans, instructions, or specifications to determine work activities; loading, unloading, or identifying building materials, machinery, or tools, distributing them to the appropriate locations, according to project plans or specifications; erecting or dismantling scaffolding, shoring, braces, traffic barricades, ramps, or other temporary structures; smoothing or finishing freshly poured cement or concrete, using floats, trowels, screeds, or powered cement finishing tools; installing sewer, water, or storm drain pipes, using pipe-laying machinery or laser guidance equipment; mopping, brushing, or spreading paints, cleaning solutions, or other compounds over surfaces to clean them or to provide protection; positioning, aligning, fitting, and welding parts to form complete units or subunits, following blueprints and layout specifications, and using jigs, welding torches, and hand tools; applying, removing, and repairing insulation on industrial equipment, pipes, ductwork, or other mechanical systems such as heat exchangers, tanks, and vessels, to help control noise and maintain temperatures; installing sheet metal around insulated pipes with screws to protect the insulation from weather conditions or physical damage; applying sealants or other protective coatings; installing drains, water supply lines, and waste disposal systems appropriate for a food processing facility; mounting compressor, condenser, and other components in specified locations on frames, using hand tools and acetylene welding equipment; lifting and align components into position, using hoist or block and tackle; adjusting, connecting, or disconnecting wiring, piping, tubing, and other parts, using hand or power tools; transferring tools, parts, equipment, and supplies to and from work stations and other areas.