713.5 Continuity.
BC § 713.5
Shaft enclosures shall be constructed as fire barriers in accordance with Section 707 or horizontal assemblies constructed in accordance with Section 711, or both. Where the roof construction is of combustible materials, shaft enclosure walls shall extend through the roof construction not less than 30 inches (762 mm) above the roof. Where the roof construction is of noncombustible materials, shaft enclosure walls shall extend from the top of the floor/ceiling assembly below to the underside of the floor or roof slab or deck above and shall be securely attached thereto. These walls shall be continuous through concealed spaces such as the space above a suspended ceiling. The supporting construction shall be protected to afford the required fire-resistance rating of the element supported. Hollow vertical spaces within the shaft enclosure construction wall shall be firestopped at every floor level. Exception: A shaft enclosure of a refuse or laundry chute shall extend through combustible or noncombustible roof construction not less than 6 feet (1828.9 mm) above the roof.
