When installing gas equipment on roofs inside access is required when the building height is over how many feet?

• A. 20 ft
• B. 15 ft
• C. 10 ft
• D. 25 ft

Answer: (B)

Safe access to gas equipment on a roof is required when the building is tall enough that reaching the roof from outside becomes impractical or unsafe. The standard sets 15 feet as that threshold. If the building height is over 15 feet, interior access to the roof—such as a door and stair or other inside route—is required so technicians can reach and service the equipment safely without climbing from the exterior. This reduces fall hazards and keeps servicing in line with code requirements. For heights 15 feet or less, interior access isn’t mandated by this rule, so exterior access methods are typically acceptable.