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435.8.7 Floor Separation

California Building Code 2016 (Vol 1 & 2) > 4 Special Detailed Requirements Based on Use and Occupancy > 435 Special Provisions for Licensed 24-Hour Care Facilities in a Group R-2.1, R-3.1, R-4 [SFM] > 435.8 Means of Egress Provisions > 435.8.7 Floor Separation

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Group R-3.1 occupancies with non-ambulatory clients housed above the first floor shall be provided with a non-fire resistance constructed floor separation at stairs which will prevent smoke migration between floors. Such floor separation shall have equivalent construction of 0.5 inch (12.7 mm) gypsum wallboard on one side of wall framing.

Exceptions:

Occupancies with at least one exterior exit from floors occupied by clients.
Occupancies provided with automatic fire sprinkler systems complying with Chapter 9.

435.8.7.1 Doors Within Floor Separations

Doors within such floor separations shall be tight fitting solid wood at least 1³/₈ inches (35 mm) in thickness. Door glazing shall not exceed 1296 square inches (32 918 mm²) with no dimension greater than 54 inches (1372 mm). Such doors shall be positive latching, smoke gasketed and shall be automatic-closing by smoke detection.