This industry comprises establishments primarily engaged in: (1) erecting and assembling structural parts made from steel or precast concrete (e.g., steel beams, structural steel components, and similar products of precast concrete); and/or (2) assembling and installing other steel construction products (e.g., steel rods, bars, rebar, mesh, and cages) to reinforce poured-in-place concrete. The work performed may include new work, additions, alterations, maintenance, and repairs. Illustrative Examples: Concrete product (e.g., structural precast, structural prestressed) installation Rebar contractors Erecting structural steel Reinforcing steel contractors Placing and tying reinforcing rod at a construction site Structural steel contractors Precast concrete panel, slab, or form installation Cross-References. Establishments primarily engaged in pouring concrete at the construction site for building foundations or structural elements are classified in Industry 238110, Poured Concrete Foundation and Structure Contractors.