Jobsite Safety and Occupational Health
What this domain tests
This domain tests OSHA construction safety as it applies to roofing: fall protection, ladders, scaffolds, PPE, hazard communication, heat illness, and electrical hazards. The exam expects the threshold and the hierarchy-guardrails first, then personal fall arrest.
Core rules and concepts
- Fall protection is required for construction work at 6 feet or more above a lower level. Roofing work commonly triggers this threshold.
- Guardrail systems, safety-net systems, or personal fall arrest systems are acceptable. Personal fall arrest requires a capable anchor, full-body harness, and prompt rescue plan.
- Ladders must extend at least 3 feet above the landing, be set at a 4:1 angle, and be secured against movement.
- Roof openings and skylights must be covered or guarded.
- Employees must be trained on hazard communication, silica, asphalt fumes, and heat illness. Water, rest, and shade are basic controls.
- Keep electrical lines de-energized or maintain safe clearance; metal ladders and roofing materials conduct electricity.
Worked example
A crew is roofing a one-story house with a 6-foot eave. Because work is at 6 feet, fall protection is required. The contractor chooses a guardrail system at the eave and covers a skylight opening with a secured, marked cover. A ladder is set at a 4:1 angle and extends 3 feet above the roof edge. The crew leader checks anchors and harnesses before work begins and reviews heat-illness precautions for a hot afternoon.
Traps that cost marks
Using a 10-foot rule for roofing; anchoring to a vent pipe; leaving a skylight unguarded; setting a ladder too steep or too shallow; and treating heat illness as a personal issue rather than a jobsite control.
Key points
- Fall protection triggers at 6 feet.
- Guardrails are preferred over fall arrest.
- Ladders need 3 feet above the landing and a 4:1 angle.
- Skylights and openings must be guarded.
- Heat and electrical hazards require active controls.