Letters of Interpretation
OSHA requirements are set by statute, standards, and regulations. Our interpretation letters explain these requirements and how they apply to particular circumstances, but they cannot create additional employer obligations. Each letter constitutes OSHA's interpretation of the requirements discussed.
Note that our enforcement guidance may be affected by changes to OSHA rules. Also, from time to time we update our guidance in response to new information.
These letters of interpretation and the standards they address may not apply to OSHA State Plans. State Plans are required to have standards and enforcement programs that are at least as effective as OSHA's and may have different or additional requirements. Please see OSHA-approved State Plans for more information.
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| Date | Title | Standard Number |
|---|---|---|
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Field bolting and welding requirements for steel joist assembly | 1926.757, 1926.757(b), 1926.757(b)(1), 1926.757(b)(2), 1926.757(b)(3), 1926.757(a)(8), 1926.757(c)(1), 1926.757(c)(2), 1926.757(a)(8)(i), 1926.757(a)(8)(ii) | |
| Application of the bloodborne pathogens standard to veterinary clinics. | 1910.1030(d)(4)(iii) | |
| Electrical standard requirements concerning covers for electrical pull boxes, junction boxes, and fittings. | 1926.405, 1926.405(b)(2), 1926.405(b)(3), 1926.405(b)(3)(ii), 1926.405(j)(1)(i) | |
| Electrical standard requirements concerning covers for electrical pull boxes, junction boxes, and fittings. | 1926.405, 1926.405(b)(2), 1926.405(b)(3), 1926.405(b)(3)(ii), 1926.405(j)(1)(i) | |
| Electrical standard requirements concerning covers for electrical pull boxes, junction boxes, and fittings. | 1926.405, 1926.405(b)(2), 1926.405(b)(3), 1926.405(b)(3)(ii), 1926.405(j)(1)(i) | |
| Electrical standard requirements concerning covers for electrical pull boxes, junction boxes, and fittings. | 1926.405, 1926.405(b)(2), 1926.405(b)(3), 1926.405(b)(3)(ii), 1926.405(j)(1)(i) | |
| Electrical standard requirements concerning covers for electrical pull boxes, junction boxes, and fittings. | 1926.405, 1926.405(b)(2), 1926.405(b)(3), 1926.405(b)(3)(ii), 1926.405(j)(1)(i) | |
| Considerations for using a continuous-climb fixed ladder on a steel stack instead of ladder cages and platforms. | 1910.27(d)(2), 1910.27(d)(5) | |
| Considerations for using a continuous-climb fixed ladder on a steel stack instead of ladder cages and platforms. | 1910.27(d)(2), 1910.27(d)(5) | |
| HAZWOPER safety and health plan requirements for Phase I and Phase II environmental assessments. | 1910.120(b)(4), 1910.120(b)(4)(ii), 1910.120(d), 1910.120, 1926.21(b)(2) | |
| HAZWOPER safety and health plan requirements for Phase I and Phase II environmental assessments. | 1910.120(b)(4), 1910.120(b)(4)(ii), 1910.120(d), 1910.120, 1926.21(b)(2) | |
| Use of ANSI C2-1997 as guidance for protecting employees working near insulated shielded conductors | 1910.269(a)(1), 1910.269(u)(4), 1910.269(u)(5), 1910.269(v)(4), 1910.269(v)(5), 1910.303(g)(2), 1910.303(h)(2), 1910.335(a)(2)(ii), 1910.333 | |
| Use of ANSI C2-1997 as guidance for protecting employees working near insulated shielded conductors | 1910.269(a)(1), 1910.269(u)(4), 1910.269(u)(5), 1910.269(v)(4), 1910.269(v)(5), 1910.303(g)(2), 1910.303(h)(2), 1910.335(a)(2)(ii), 1910.333 | |
| HAZWOPER safety and health plan requirements for Phase I and Phase II environmental assessments. | 1910.120(b)(4), 1910.120(b)(4)(ii), 1910.120(d), 1910.120, 1926.21(b)(2) |