When a building's height is greater than or equal to 75 feet, at least one of the required exits must be:
A. a fire tower, B. a smoke proof tower, C. a smoke proof enclosure, D. B+C but not A, E. A, B+C
Answer is E.
A, B and C all refer to an enclosed stairway constructed to be noncombustible, designed to provide a refuge for occupants to safely leave the building.
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