Use Requirements
Prohibited Scaffolds
Shore and lean-to scaffolds are strictly prohibited. 1926.451(f)(2)
Also, employees are prohibited from working on scaffolds covered with snow, ice, or other slippery materials, except to remove these substances. 1926.451(f)(8)
The shore scaffold in the image to the right is not permitted to be used per OSHA or ANSI. In this picture, the workers have a shore scaffold on top of another shore scaffold. Access is unsafe both from above and below. The only thing holding this scaffold up is the DUMPSTER!
Clearance Distances
Scaffolds must not be erected, used, dismantled, altered, or moved such that they or any conductive material handled on them might come closer to exposed and energized power lines than as follows: 1926.451(f)(6)
Insulated Lines
| Voltage | Minimum Distance | Alternatives |
|---|---|---|
| Less than 300 volts | 3 feet | - |
| 300 volts to 50 kilovolts (kV) | 10 feet | - |
| More than 50 kV | 10 feet plus 0.4 inches for each 1 kV more than 50 kV |
2 times the length of the line insulator, but never less than 10 feet |
Uninsulated Lines
| Voltage | Minimum Distance | Alternatives |
|---|---|---|
| Less than 50 kV | 10 feet | - |
| More than 50 kV | 10 feet plus 0.4 inches for each 1 kV more than 50 kV |
2 times the length of the line insulator, but never less than 10 feet |
Knowledge Check Choose the best answer for the question.
2-8. Which of the following types of scaffolds is strictly prohibited by OSHA?
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