14 July 2004
Including changes 12 April 2005
Crossing of horizontal wiring should be at 90-degree angles
Penetrations. Raceways, cable trays, and cables for power, data,
and communications systems penetrating non-rated and fire-rated floors, walls,
and other partitions of building construction must be fire stopped. Fire stopping
must be accomplished by using a combination of Underwriters Laboratories (UL)
listed materials and devices, including penetrating raceway, cable tray, or cables,
required to make a complete fire stop. See UFGS 07840, Firestopping for
additional information on listed materials. Verify that cabling and other
penetrating elements and supporting devices have been completely installed and
temporary lines and cables have been removed.
CLASSIFIED NETWORK REQUIREMENTS. Protected Distributed
Systems (PDS) are used to protect the transmission of unencrypted classified
information such as the Secret Internet Protocol Router Network (SIPRNET). When
required, provide a PDS in accordance with Appendix E.