Excerpts from 2000 INTERNATIONAL BUILDING CODE®

711.3.1 Through penetrations.

Through penetrations of fire-resistance-rated  walls  shall  comply  with Section 711.3.1.1 or 711.3.1.2.

Exception: Where the penetrating items are steel, fer- rous or copper pipes or steel conduits, the annular space between the penetrating item and the fire-resistance- rated wall shall be permitted to be protected as follows:

1. In concrete or masonry walls where the penetrating item is a maximum 6-inch (152 mm) nominal diameter and the opening is a maximum 144 square inches (0.0929 m2), concrete, grout or mortar shall be permitted where installed the full thickness of the wall or the thickness required to maintain the fire-resistance rating; or

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 E 119 time temperature fire conditions under a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water at the location of the penetration for the time period equivalent to the fire-resistance rating of the construction penetrated.

711.3.1.1 Fire-resistance-rated assemblies.

Penetrations shall be installed as tested in an approved fire-resistance-rated assembly.

711.3.1.2 Through-penetration firestop system.

Through penetrations shall be protected by an approved penetration firestop system installed as tested in accordance with ASTM E 814, with a minimum positive pressure differential of 0.01 inch (2.49 Pa) of water and shall have an F rating of not less than the required fire-resistance rating of the wall penetrated.