The lexicon of the top500 ( The Encyclopedia for Classification Codes ) explains the codes and definitions in the world of economical classifications.
NAICS Code 3323 Architectural and Structural Metals Manufacturing
The NAICS Code 3323 is described as
Architectural and Structural Metals Manufacturing It belongs to the code group
NAICS Code 332 Fabricated Metal Product Manufacturing
To this Code "3323" belongs the sub codes
NAICS Code 33231: Plate Work and Fabricated Structural Product Manufacturing (Plate Work and Fabricated Structural Product Manufacturing)
NAICS Code 33232: Ornamental and Architectural Metal Products Manufacturing (Ornamental and Architectural Metal Products Manufacturing)