704.8 Embedments and enclosures.
BC § 704.8
Pipes, wires, conduits, ducts or other service facilities shall not be embedded in the required fire protective covering of a structural member that is required to be individually encased. Exception: Pipes, wires, and conduits may be installed in the space between the required fire protection and the structural member protected, provided that where such facilities pierce the required fire protection: 1. The area of the penetration does not exceed two percent of the area of the fire protection on any one face, 2. The penetrations are closed off with close-fitting metal escutcheons or plates, and3. the concealed space is firestopped at each story, and 3. The concealed space is firestopped at each story.
