What is the minimum height that doors must not be less than?

The minimum height that doors must not be less than is typically established to ensure accessibility and functionality in various environments. The correct answer reflects the standard requirement in many building codes and accessibility guidelines, which state that doors should be a minimum of 7 feet (or 84 inches) to accommodate people of various heights, including individuals using mobility devices. This height allows for adequate clearance for users entering and exiting, preventing obstruction and enhancing safety.

While other options suggest higher door heights, 7 feet is a well-recognized standard in residential and commercial settings. Regulations such as the Accessibility Guidelines for buildings, which align with the Americans with Disabilities Act (ADA), support this minimum requirement to ensure that doors are universally accessible. Meeting this standard helps create environments that are inclusive and comply with design regulations.