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Where the horizontal assembly separates incidental uses from the remainder of the building, the assembly shall have a fire-resistance rating of not less than that required by Section 509.

Related Code Sections

707.3.7 Fire and Smoke Protection Features, Incidental Uses
The fire barrier separating incidental uses from other spaces in the building shall have a fire-resistance rating of not less than that indicated ...
707.3.7 Fire and Smoke Protection Features, Incidental Uses
The fire barrier separating incidental uses from other spaces in the building shall have a fire-resistance rating of not less than that indicated ...
509.4.1 General Building Heights and Areas, Separation
Where Table 509 specifies a fire-resistance-rated separation, the incidental uses shall be separated from the remainder of the building by a fire ...