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All fire walls shall be constructed of noncombustible materials providing fire resistance not less than the following:
(a) Walls exceeding 14 feet in unsupported height – eight hours;
(b) Walls not exceeding 14 feet in unsupported height – four hours.
All structural members supporting fire walls shall be of construction providing fire resistance not less than that required for the wall.
(Prior code § 62-1.2)