| # | Letters of Interpretation |
|---|---|
| 1 | - 1910.160(b)(13) - Fire detection and employee alarm systems. |
| 2 | - 1910.160(b)(3) - Fire detection and employee alarm systems. |
| 3 | - 1910.160, 1910.160(b)(3), 1910.160(b)(13) - Fire detection and employee alarm systems. |
| 4 | - 1910.160 - Annual inspection of the fixed extinguishing system. |