What is the maximum allowable pressure for a latch on an emergency egress door?

The maximum allowable pressure for a latch on an emergency egress door is established to ensure that the latch can be easily opened in an emergency situation without excessive force. Option B, which specifies 15 psf (pounds per square foot), is recognized as the standard requirement. This level of pressure is calibrated to provide a balance between security when the door is not in use and ease of operation during an emergency, ensuring that individuals can quickly exit the building if necessary.

Standards for emergency exits often focus on facilitating swift evacuation, which is critical in situations such as fires or other emergencies. By limiting the latch pressure to 15 psf, building codes aim to minimize the risk of hindrance during emergency evacuations, thus prioritizing the safety and well-being of occupants. It is essential that any latch mechanism on an emergency egress door can be easily activated without requiring excessive strength, reflecting the importance of safety in design regulations for exits in buildings.