Coating, engraving, heat treating, and allied activities (NAICS 33281): 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: 1.3. "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 2.0 recordable cases. With 400,000 hours (about 200 employees) the figure is 8.0.
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: Coating, engraving, heat treating, and allied activities (NAICS 3328), TRC 4.0, DART 2.7.
Detailed industries under NAICS 33281
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 332811 | Metal heat treating | 3.3 | 2.6 |
| 332812 | Metal coating, engraving (except jewelry and silverware), and allied services to manufacturers | 4.1 | 3.1 |
| 332813 | Electroplating, plating, polishing, anodizing, and coloring | 4.1 | 2.3 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.