specifications - FAACO - Federal Aviation Administration Contract ...

FTWIC-2235June, 2009D. STRAP HANGERS:1" wide x 3/16" thick steel strap hanger conforming to Fed Spec QQ-S-775.E. HANGER RODS:Zinc coated threaded steel rods.F. COLD ROLLED CHANNEL:1 1/2" cold formed painted steel channels weighing not less than 300 #/1000 linear feet..PART 3.00EXECUTION3.01 PREPARATION:Remove excess materials, tools, trash and debris from work areas. Sweep the area and maintain itfree of debris to allow movement of a rolling scaffold.3.02 INSTALLATION:A. Furnish and install exposed grid system in strict accordance with the manufacturer'srecommendation. Place 9 gauge wire hangers, spaced at no more than four (4') footcenters along each main runner and no more than 6 inches from each end. Twist wiresufficiently to prevent slipping. Erect the suspension system to the proper height andlevel in both directions. Where necessary to cut a main runner to center a light fixture ora ceiling register, add hanger wires to both sides at the termination of the runner.B. The system shall conform to the plans and arranged to result in equal borders of thelargest possible size. Adjust grid as necessary to prevent cut tile under two (2") inches inwidth where possible. Provide a continuous wall molding where acoustical ceiling buttsagainst vertical surfaces.C. Light fixtures, ceiling diffusers, speakers and other ceiling mounted accessories, shall notbe carried by the suspension system. Install four (4) hanger wires; one at each corner offluorescent fixture to structure above at each light fixture. Provide not less than twoadditional wires at each diffuser or speaker.D. Conform to ceiling patterns indicated on the drawings, or as directed by the ContractingOfficer. Provide continuous wall moldings at vertical surfaces. Make joints fit closewith edges of each tile completely covered by the suspension system.E. Provide 1 1/2" cold rolled channels where need to supplement carrying members.Channels shall be suspended by 12 gauge wire with saddle ties around member. Provideadditional support member where required by design and for headers.F. Install acoustical panels units directionally. Mix tile from at least three cartons in eachspace.09509-4