| # | Directives |
|---|---|
| 1 | - National - STD 01-12-001 [STD 1-12.1] - Defining Acceptable Guarding of Fan Blades |
| # | Regulations |
|---|---|
| 1 | - 1910.212(a)(5) - General requirements for all machines. |
| # | Standard Interpretations |
|---|---|
| 1 | - 1910.212(a)(5) - Maximum permissible guard openings for blade guards on cooling fans |
| 2 | - 1910.212(a)(5) - Restricting fans to low speed does not void machine guarding standards. |