A level working platform needs to be provided at service side of appliances on top of roofs at what size?

• A. 24 in x 24 in
• B. 36 in x 36 in
• C. 30 in x 30 in
• D. 42 in x 42 in

Answer: (C)

A level working platform on the service side of roof-mounted appliances must be large enough to give a technician stable footing and room to reach connections and operate controls safely. The minimum space specified is 30 inches by 30 inches, which provides adequate room to stand, maneuver tools, and access the appliance without stepping off the roof edge. A smaller platform, like 24 by 24, would be too cramped for safe servicing, while larger sizes such as 36 by 36 or 42 by 42 are allowed when space permits but exceed the minimum requirement. Therefore, the required size is 30 in x 30 in.