| # | Directives |
|---|---|
| 1 | - National - STD 01-01-009 [STD 1-1.9] - Cancellation of STD 01-01-009, December 29, 1978 - PDF |
| 2 | - National - STD 01-01-009 [STD 1-1.9] - 29 CFR 1910.27, Clarification of Fixed Ladders, Relative to Manhole (Rungs) Steps |
| # | Directives |
|---|---|
| 1 | - National - STD 01-01-009 [STD 1-1.9] - Cancellation of STD 01-01-009, December 29, 1978 - PDF |
| 2 | - National - STD 01-01-009 [STD 1-1.9] - 29 CFR 1910.27, Clarification of Fixed Ladders, Relative to Manhole (Rungs) Steps |