Passageways to gas units on top of buildings shall be not less than how many inches?

Passageways to gas units on top of buildings shall be not less than how many inches?

• A. Not less than 12 inches
• B. Not less than 24 inches
• C. Not less than 36 inches
• D. Not less than 18 inches

Answer: (B)

Access around gas units on rooftops must have enough room for a technician to move, use tools, and service the unit safely. The minimum passageway width is 24 inches (two feet), which provides sufficient clearance to access panels, connections, and controls without awkward contortions or risk of striking adjacent equipment or rails. A narrower space, like 12 or 18 inches, would hinder movement and make servicing hazardous. A wider minimum, such as 36 inches, is beyond the required minimum and isn’t necessary for basic access, though it could occur if space allows. Therefore, 24 inches is the correct minimum.

Access around gas units on rooftops must have enough room for a technician to move, use tools, and service the unit safely. The minimum passageway width is 24 inches (two feet), which provides sufficient clearance to access panels, connections, and controls without awkward contortions or risk of striking adjacent equipment or rails. A narrower space, like 12 or 18 inches, would hinder movement and make servicing hazardous. A wider minimum, such as 36 inches, is beyond the required minimum and isn’t necessary for basic access, though it could occur if space allows. Therefore, 24 inches is the correct minimum.