In means of egress design, revolving doors are severely limited, and what must be provided within 10 feet?

• A. A swinging door
• B. A stairway
• C. A ventilation shaft
• D. An automatic exit sign

Answer: (A)

Revolving doors can slow or trap people during an evacuation, so means of egress must include a readily operable alternative exit within a short distance. Providing a swinging door within 10 feet gives a direct, usable path out if the revolving door can’t be used, helping ensure a rapid and safe exit. The swinging door must be easily opened from the egress side without special knowledge or tools. The other choices don’t meet this requirement: a stairway is a vertical route and not necessarily an immediate exit on the same level, a ventilation shaft isn’t an approved egress, and an automatic exit sign, while important for directing people, does not itself provide an exit path.