South Carolina Code of Regulations
Chapter 8 - BUILDING CODES COUNCIL
Article 12 - INTERNATIONAL RESIDENTIAL CODE
Section 8-1205 - IRC R302.4.1 Through penetrations
Universal Citation: SC Code Regs 8-1205
Current through Register Vol. 48, No. 9, September 27, 2024
Through penetrations of fire-resistance-rated wall or floor assemblies shall comply with Section 302.4.1.1 or R302.4.1.2. No penetrations shall pass completely through the fire rated assembly separating townhouse units.
Exceptions:
1. Where the penetrating items are steel, ferrous or copper pipes, tubes or conduits, the annular space shall be protected as follows:
1.1. In concrete or masonry wall or floor
assemblies, concrete, grout or mortar shall be permitted where installed to the
full thickness of the wall or floor assembly or the thickness required to
maintain the fire-resistance rating, provided that both of the following are
complied with:
1.1.1. The nominal diameter of
the penetrating item is not more than 6 inches (152 mm).
1.1.2. The area of the opening through the
wall does not exceed 144 square inches (92 900
mm2).
1.2. The material used to fill the annular
space shall prevent the passage of flame and hot gases sufficient to ignite
cotton waste where subjected to ASTM E119 or UL 263 time temperature fire
conditions under a positive pressure differential of not less than 0.01 inch of
water (3 Pa) as the location of the penetration for the time period equivalent
to the fire-resistance rating of the construction penetrated.
2. The annular space created by the penetration of water-filled fire sprinkler piping, provided that the annular space is filled using a material complying with Item 1.2 of Exception 1.
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