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Title: Section 334  •  Size: 4249

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SECTION 334 - CONSTRUCTION, HEIGHT AND ALLOWABLE AREA

334.1 General. Buildings or portions of buildings classified as Group R, Division 4 may be constructed of any materials allowed by this code, shall not exceed two stories in height or be located above the second story in any building, and shall not exceed 3,000 square feet (278.7 ) in floor area per story except as provided in Sections 504, 505 and 506.

334.2 Special Provisions. Group R, Division 4 Occupancies having more than 3,000 square feet of floor area above the first story shall be of not less than one-hour fire-resistive construction throughout.

334.3 Mixed Occupancies. Group R, Division 4 Occupancies shall be separated from Group H Occupancies by a four-hour fire-resistive occupancy separation and shall be separated from all other occupancies by a one-hour fire-resistive occupancy separation.

EXCEPTIONS: 1. An occupancy separation need not be provided between a Group R, Division 4 Occupancy and a carport having no enclosed uses above, provided the carport is entirely open on two or more sides.

2. In the one-hour occupancy separation between a Group R, Division 4 and Group U, Division 1 Occupancy, the separation may be limited to the installation of materials approved for one-hour fire-resistive construction on the garage side and a self-closing, tight-fitting solid-wood door 1 3/8 inch (35 mm) in thickness will be permitted in lieu of a one-hour fire assembly. Fire dampers need not be installed in air ducts passing through the wall, floor or ceiling separating a Group R, Division 4 Occupancy from a Group U, Division 1 Occupancy, provided such ducts within the Group U Occupancy are constructed of steel having a thickness not less than 0.019 inch (0.48 mm) (No. 26 galvanized sheet gauge) and have no openings into the Group U Occupancy.

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