23591  Structural Steel Erection Contractors

This industry comprises establishments primarily engaged in one or more
of the following: (1) erecting metal, structural steel, and similar
products of prestressed or precast concrete to produce structural
elements, building exteriors, and elevator fronts; (2) setting rods,
bars, rebar, mesh, and cages, to reinforce poured-in-place concrete;
and (3) erecting cooling towers and metal storage tanks. The structural
steel erection work performed includes new work, additions,
alterations, reconstruction, and maintenance and repairs.