332323  Ornamental and Architectural Metal Work Manufacturing

This U.S. industry comprises establishments primarily engaged in
manufacturing ornamental and architectural metal work, such as
staircases, metal open steel flooring, fire escapes, railings, and
scaffolding.

The data published with NAICS code 332323 include the following
SIC industries:

3446 Architectural metal work 
3449 Miscellaneous metal work (pt)
3523 Farm machinery and equipment (pt)