S.C. Code Regs. § 8-1205 - IRC R302.4.1 Through penetrations

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.

Notes

S.C. Code Regs. § 8-1205

Added by State Register Volume 37, Issue No. 6, eff June 28, 2013; State Register Volume 40, Issue No. 06, eff. 6/24/2016; State Register Volume 43, Issue No. 05, eff. 5/24/2019; State Register Volume 44, Issue No. 06, eff. 6/26/2020; State Register Volume 46, Issue No. 05, eff. 5/27/2022.