The use of revolving doors in a means of egress is severely limited. A swinging door must be provided within how many feet?

• A. 5 feet
• B. 10 feet
• C. 15 feet
• D. 20 feet

Answer: (B)

Revolving doors slow and complicate evacuation, so the code requires an alternative, conventional swinging door to be readily accessible along the egress path. Placing a swinging door within 10 feet ensures occupants have a quick, usable exit option if the revolving door is blocked, jammed, or otherwise unusable during an emergency. It keeps egress efficient and safer for everyone, including those who may need more time to exit or who cannot use a revolving door. Ten feet strikes a practical balance: it’s close enough to provide a reliable alternate path, but not so close that it undermines the design or adds unnecessary complexity. A distance of five feet would be impractical for a full-size door to operate, while fifteen or twenty feet would create a longer detour and potential delays in evacuations.