235910  Structural Steel Erection Contractors

This U.S. 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. 

The data published with NAICS code 235910 include the following SIC industry:

1791 Structural steel erection special trade contractors