What is the minimum size required for trap doors providing access to rooftop equipment?

The minimum size required for trap doors providing access to rooftop equipment is 24 inches by 36 inches. This size ensures that technicians and maintenance personnel can safely and efficiently access HVAC equipment located on rooftops, which often includes larger components that require adequate space for both entry and exit.

Having a trap door of this dimension allows workers to maneuver their tools and any necessary equipment without the risk of injury or damage. It also supports safety regulations that mandate suitable access points for performance and maintenance tasks. Access points must consider the potential for routine inspections, troubleshooting, and equipment servicing, which necessitates a sufficient opening size to facilitate these activities comfortably.