Safety, Fire Prevention, and Torch-Applied Hazards
Safety, Fire Prevention, and Torch-Applied Hazards
This domain tests hot-work controls, torch and propane safety, fire watch, PPE, and burn prevention. Torch-applied modified bitumen is a high-risk operation, so the exam favors specific controls over general caution.
Core rules
- Use a hot-work permit and a written fire-prevention plan. Clear combustibles from the work area and protect below, including concealed spaces, wall cavities, and openings.
- Maintain a fire watch during work and for the required period after, commonly at least 1 hour under NFPA 51B or longer if the insurer or conditions require.
- Provide charged extinguishers appropriate to the hazard. Know the nearest alarm and exit.
- Keep propane cylinders upright, secured, and away from heat. Check hoses and connections for leaks; ignite with a striker, not a lighter.
- Do not torch over unprotected combustible insulation, wood, plastic, or unknown materials. Use a heat shield and alternative method where required.
- Wear PPE: gloves, eye protection, flame-resistant clothing, and fall protection at edges.
Worked example
A torch flame is being used near a combustible wall cavity with no fire watch below. Stop the work. The cavity can conceal smoldering material that appears hours later. Require a permit, a fire watch with access to the concealed space, protection at the wall, and a charged extinguisher before restarting.
Traps
Fire watch only while the torch is lit; no permit; cylinders lying down; missing extinguisher; torching over unknown substrate; ignoring smoldering odors.