SIC Code 3449 — Miscellaneous Structural Metal Work

4-digit industry in the 1987 Standard Industrial Classification — still requested by banks, insurers, SEC filings and legacy systems.

Code	3449
Title	Miscellaneous Structural Metal Work
System	SIC 1987 (final edition — replaced by NAICS in 1997)

The SIC was last revised in 1987 and officially superseded by NAICS in 1997, but it never fully disappeared: the SEC still tags EDGAR filings with SIC codes, and many banks, insurers and legacy databases keep requesting it. That is why converting between the two systems is still routine work.

NAICS equivalents of SIC 3449

From the official U.S. Census concordance (1987 SIC → 2002 NAICS). Where the 2002 code no longer exists in NAICS 2022, the closest current code is shown.

NAICS 2002	Title (2002)	Current 2022 code
332114	Custom Roll Forming	332114 (same code)
332312	Fabricated Structural Metal Manufacturing	332312 (same code)
332323	Ornamental and Architectural Metal Work Manufacturing	332323 (same code)

Other SIC codes in 34xx

• 3411 — Metal Cans
• 3412 — Metal Shipping Barrels, Drums, Kegs, and Pails
• 3421 — Cutlery
• 3423 — Hand and Edge Tools, Except Machine Tools and Handsaws
• 3425 — Saw Blades and Handsaws
• 3429 — Hardware, Not Elsewhere Classified
• 3431 — Enameled Iron and Metal Sanitary Ware
• 3432 — Plumbing Fixture Fittings and Trim
• 3433 — Heating Equipment, Except Electric and Warm Air Furnaces
• 3441 — Fabricated Structural Metal
• 3442 — Metal Doors, Sash, Frames, Molding, and Trim Manufacturing
• 3443 — Fabricated Plate Work (Boiler Shops)

Data: 1987 SIC titles (OSHA/Census) and official Census concordance — U.S. government works in the public domain (17 U.S.C. §105). Suggested reference, not an official determination.