Guards must be provided for appliances within what distance, in feet, of a roof edge?

The requirement for providing guards around appliances near a roof edge is to ensure safety by preventing falls and protecting both personnel and equipment. The regulation typically specifies that guards must be provided for appliances within 10 feet of a roof edge. This distance recognizes that individuals working near the edge need adequate protection from potential hazards, particularly when performing tasks that require accessing equipment.

Choosing 10 feet as the correct answer acknowledges the need for a balance between safety and practical accessibility for maintenance and operation of appliances located close to the roof edge. Other distances listed might not adequately address the risks associated with working near edges, which can lead to accidents or falls if proper safety measures, such as guards, are not implemented.