specifications - FAACO - Federal Aviation Administration Contract ...

FTWIC-2235June 2009and UL 96A. Air terminals shall extend at least ten inches above the object or area theyare intended to protect. Air terminals shall be placed on the ridges of pitched roofs andaround the perimeter of flat or gently sloping roofs at intervals not exceeding 20 feet,except that air terminals twenty four inches or higher may be placed at intervals notexceeding 25 feet.C. GROUND RODS:Ground rods shall be made of copper clad steel and, except where otherwise specified,shall be not less than 3/4 inch in diameter and 10 feet in length.D. FASTENERS:Fasteners shall be of the same material as the conductor base material or bracket beingfastened, or other equally corrosion resistant material. Galvanized or plated materialsshall not be used.E. FITTINGS:Fittings - Bonding devices, cable splicers, and miscellaneous connectors shall be suitablefor use with the installed conductor and shall be copper, bronze or aluminum with boltpressure connections to the cable. Cast or stamped crimp type fittings shall not be used.PART 3.00EXECUTION3.01 INSTALLATION:A. The Contract Drawings indicate the extent and general arrangement of the lightningprotection system. Lightning protection systems for all applications shall conform toNational Fire Protection Association Code No. 780 and the NEC, whichever is morestringent.B. Installation shall be performed by a certified master installer. Installer shall provide anUnderwriters' Laboratories Master Label for the facilities.C. Air terminals shall be provided on the highest projections and at intervals not exceeding20 feet along the top surface of overhanging coping. Air terminals shall extend at least10 inches above the object or area that they are intended to protect. Ornamental metalwork of the building, extending not less than 10 inches above the projection and havingconductivity and cross sectional area equal to that required for air terminals shall beconnected to the lightning protection system.D. Roof and down conductors shall be stranded and shall meet the requirements given inNFPA 780. Roof and down conductors shall maintain a horizontal or downward course.No bend in a roof or down conductor shall form an included angle of less than 90degrees, nor shall it have a bend radius of less than eight inches. Conductors shall berouted external to buildings and six feet or more from power or signal conductors. Downconductors shall be routed outside of any structure and shall not penetrate or invade thatstructure. All down conductors except one may be provided with a screw type connectoras described in UL 96 where lightning protection system testing may be required. Down16670-3