Gas appliances on rooftops must have a clearance from unit to roof edge of how many feet?

Gas appliances on rooftops must have a clearance from unit to roof edge of how many feet?

• A. 3 ft
• B. 6 ft
• C. 8 ft
• D. 10 ft

Answer: (B)

Gas appliances placed on rooftops must be set back from the roof edge to create a safe working and operating buffer around the unit. The required setback is six feet. This distance helps protect people and property by reducing the chance that wind-driven gas, vapors, or flame could reach the edge, parapet, or nearby openings, and it provides enough room for safe service, piping, and wiring installation and maintenance around the unit. A smaller setback would offer a weaker protection against wind effects and edge hazards; a larger setback isn’t required by the code.

Gas appliances placed on rooftops must be set back from the roof edge to create a safe working and operating buffer around the unit. The required setback is six feet. This distance helps protect people and property by reducing the chance that wind-driven gas, vapors, or flame could reach the edge, parapet, or nearby openings, and it provides enough room for safe service, piping, and wiring installation and maintenance around the unit. A smaller setback would offer a weaker protection against wind effects and edge hazards; a larger setback isn’t required by the code.