Navigational, measuring, electromedical, and control instruments manufacturing (NAICS 33451): 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: 0.3. "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 0.5 recordable cases. With 400,000 hours (about 200 employees) the figure is 1.8.
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: Navigational, measuring, electromedical, and control instruments manufacturing (NAICS 3345), TRC 0.9, DART 0.5.
Detailed industries under NAICS 33451
| NAICS | Industry | TRC | DART |
|---|---|---|---|
| 334510 | Electromedical and electrotherapeutic apparatus manufacturing | 0.8 | 0.4 |
| 334511 | Search, detection, navigation, guidance, aeronautical, and nautical system and instrument manufacturing | 0.5 | 0.4 |
| 334512 | Automatic environmental control manufacturing for residential, commercial, and appliance use | 0.6 | 0.4 |
| 334514 | Totalizing fluid meter and counting device manufacturing | 0.9 | 0.6 |
| 334515 | Instrument manufacturing for measuring and testing electricity and electrical signals | 0.9 | 0.7 |
| 334516 | Analytical laboratory instrument manufacturing | 1.2 | 0.5 |
| 334517 | Irradiation apparatus manufacturing | 1.3 | 1.2 |
| 334519 | Other measuring and controlling device manufacturing | 1.2 | 0.9 |
Source: BLS Survey of Occupational Injuries and Illnesses, Table 1 (2024). NAICS 2017 codes as published by BLS.