Plate work and fabricated structural product manufacturing (NAICS 33231): average TRIR and DART
These are the 2024 private-industry incidence rates from the U.S. Bureau of Labor Statistics, per 100 full-time-equivalent workers. Prequalification forms often ask whether your TRIR and DART are at or below these numbers.
Other recordable cases: 1.7. "Not published" means the data does not meet BLS publication guidelines.
What this means for your prequal form
Worked example: a company in this industry with 100,000 hours worked in a year (about 50 full-time employees) would match the industry average at 1.8 recordable cases. With 400,000 hours (about 200 employees) the figure is 7.0.
TRIR = recordable cases × 200,000 ÷ hours worked. DART = (days-away cases + restricted/transfer cases) × 200,000 ÷ hours worked. Use your OSHA 300A totals for each calendar year.
Parent industry: Architectural and structural metals manufacturing (NAICS 3323), TRC 3.5, DART 1.9.
Detailed industries under NAICS 33231
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 332311 | Prefabricated metal building and component manufacturing | 3.4 | 2.0 |
| 332312 | Fabricated structural metal manufacturing | 3.4 | 1.8 |
| 332313 | Plate work manufacturing | 3.8 | 1.9 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.