specifications - FAACO - Federal Aviation Administration Contract ...

FTWIC-2235June 2009P. Use PVC-coated rigid metal conduit for all conduits penetrating slabs. Where PVCcoatedrigid steel conduit joins a dissimilar conduit, the fittings shall also be PVC-coated.Q. Conduit buried in earth shall PVC-coated rigid steel. All conduit installed in mechanicalrooms, exposed in Engine Generator area, outdoors, or areas where it may be subject tophysical damage shall be in IMC or rigid steel. EMT shall only be used indoors in drylocations where not subject to physical damage.R. Use suitable conduit caps to protect installed conduit against entry of dirt and moisture.S. Install empty conduits in or below slabs so that a threaded fitting with PVC plug is placedon each conduit and is flush with the concrete or finished floor surface.T. Provide and locate in forms all sleeves and inserts required for framed, cast, or masonryopenings for conduits. Stub up and protect open ends of conduits before any concrete ispoured. Furnish sizes of required equipment pads and provide and install all bolts andfittings required to be cast in them. Locate and size all openings in work of other trades.A sufficient number of sleeves and frames shall be installed so that conduit and otheritems may be installed as required for proper installation of work.U. Where the word "concealed" is used in connection with conduit, ducts, and cable trays,the word is understood to mean hidden from sight as in chases, furred spaces or abovesuspended ceilings. "Exposed" is understood to mean open to view.V. In general, raceways through roof seals shall be installed in curbs provided formechanical equipment. When this is not possible, the method of penetration shall utilizesuitable pitch pockets of a type acceptable to the Contracting officers representative.Submit Shop Drawings of the method to be used. In all cases, the Contractor is totallyresponsible for insuring such penetrations are absolutely water tight.W. Install pull wire in all empty conduits. The pull wire shall be zinc-coated steel or plasticwith a minimum 200 pound tensile strength. Ten inches of slack shall be left at each endof the pull wire.X. Telephone and communications system conduits shall be installed in accordance with theprevious requirements for conduit and tubing, as well as with the following additionalrequirements. Runs shall not exceed 75 feet for 3/4-inch conduit sizes. Runs shall notexceed 150 feet for one inch or larger sizes of conduit and shall not contain more thanthree 90-degree bends or the equivalent. Additional pull or junction boxes shall beinstalled to comply with these limitations whether or not indicated. Inside radii of bendsin conduits of one inch size or larger shall be not less than ten times the nominaldiameter.3.02 UNDERGROUND DUCT BANK INSTALLATION:A. Install top of duct bank a minimum of 18" below finished grade.B. Install conduit with minimum grade of 4" per 100'. Duct banks shall be sloped towardsmanholes or pullboxes where they exist. The Contractor shall verify in the field the16111-6 FTWIC-2034