Raise, place, and unite iron or steel girders, columns, and other structural members to form completed structures or structural frameworks. They erect metal storage tanks and assemble prefabricated metal buildings.

Fabricate, assemble, install, and repair sheet metal products and equipment, such as ducts, control boxes, drainpipes, and furnace casings. They set up and operate fabricating machines to cut, bend, and straighten sheet metal. They use hammers to shape metal over anvils or blocks. They operate welding equipment to join, fix and smooth burred surfaces.

Cover roofs of structures with shingles, slate, asphalt, aluminum, wood, or related materials. They spray roofs, sidings, and walls with material to bind, seal, insulate, or soundproof sections of structures.

Position and secure steel bars or mesh in concrete forms in order to reinforce concrete. They use a variety of fasteners, rod bending machines, blowtorches, and hand tools. Includes rod busters.

Apply interior or exterior plaster, cement, stucco, or similar materials. They also set ornamental plaster.

Lay out, assemble, install, or maintain pipe systems, pipe supports, or related hydraulic or pneumatic equipment for steam, hot water, heating, cooling, lubricating, sprinkling, or industrial production or processing systems.

Cover interior walls or ceilings of rooms with decorative wallpaper or fabric, or attach advertising posters on surfaces such as walls and billboards. They remove old materials or prepare surfaces to be papered.

Apply insulating materials to pipes or ductwork, or other mechanical systems in order to help control and maintain temperature.

Install glass in windows, skylights, store fronts, and display cases, or on surfaces, such as building fronts, interior walls, ceilings, and tabletops.

Apply plasterboard or other wallboard to ceilings or interior walls of buildings. They apply or mount acoustical tiles or blocks, strips, or sheets of shock absorbing materials to ceilings and walls of buildings to reduce or reflect sound. This includes lathers who fasten wooden, metal, or rockboard lath to walls, ceilings or partitions of buildings to provide a support base.