For egress purposes, what is the minimum height requirement for all doors?

For egress purposes, the minimum height requirement for doors is set to ensure that all individuals can safely and easily exit a building in case of an emergency. The correct answer, which stands at 80 inches, is established by building codes and regulations, providing a standard that accommodates the majority of the population, including those who may be taller. This height ensures that individuals do not have to crouch or bend down when passing through doorways, which might create hazards during an emergency evacuation.

Additionally, the choice of 80 inches as the minimum height requirement helps prevent accidental head injuries and ensures compliance with accessibility standards, allowing all occupants, including those using mobility devices, to navigate an exit safely. Understanding this standard is crucial for anyone involved in the design, construction, or inspection of commercial buildings, as it directly impacts the safety and accessibility of the structures.