Pipes, wires, conduits, ducts or other service facilities shall not be embedded in the required fire protection 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, and
3. the concealed space is firestopped at each story.
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, and
3. the concealed space is firestopped at each story.