COBB COUNTY SCHOOLS /S&A % BID DOCUMENTS 2/18/11 SECTION SPRINKLER SYSTEM

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1 SECTION PART 1 - GENERAL 1.1 CODES A. Work shall conform to NFPA 13 Sprinkler Systems, 2002 Edition and NFPA 24 Outside Protection, 2002 Edition. NFPA 14 Standpipe Systems, 2000 Edition and International Fire Code, 2006 Edition with 2010 Georgia State Amendments. 1.2 A. Provide a complete wet pipe sprinkler system in all heated areas of the Classroom building and Gymnasium. Connect new sprinklers to the existing risers. B. Provide outside and fire line main as indicated on the Plumbing Site Plan. Sheet P001. C. The occupancy classification of the building is light hazard except in specific areas where other classifications are required by NFPA 13. The sprinkler system shall be designed to deliver 0.10 gpm per square foot over an area of 1500 square feet in light hazard areas. D. The contractor shall determine the location of all sprinkler heads, arrange and size the sprinkler piping using hydraulic calculation. 1.3 SHOP DRAWINGS A. Submit the following information: 1. Water flow test data. 2. Hydraulic Calculations. 3. Materials and equipment lists, manufacturer's data and cut sheets. 4. Shop drawings, including dimensioned plans, sections, details, and elevations showing locations and arrangement of piping, sprinklers, valves, alarms and dampers. 5. Certificate of tests. B. The arrangement of sprinkler piping exposed to view in finished areas shall be approved by the Architect. C. Shop drawings shall be submitted to and approved by the Georgia State Fire Marshal before any work is started

2 1.4 HYDRAULIC CALCULATIONS A. The contractor shall perform a water flow test at the site in accordance with the procedure outlined in NFPA 13, Chapter 6. B. Hydraulic calculations indicating that the pipe sizes selected will deliver the required water flow density when the sprinkler system is connected to the existing water supply system shall be made by the contractor and submitted for approval. C. The calculations must be made using the HASS system or other approved computer program. 1.5 UTILITY CONNECTIONS A. It shall be the Contractor's responsibility to determine all requirements of the local Water Department regarding new utility service to the building. The installation shall be in complete accordance with those requirements. B. All costs incidental to complete utility services, including cutting and patching of street, water main connections and water meter shall be included in the bid price. 1.6 EXCAVATION AND BACKFILL A. All excavation and backfill for work under this section shall be in accordance with Division 2 requirements. PART 2 - PRODUCTS 2.1 INSIDE PIPING A. Piping for the sprinkler systems shall be steel pipe manufactured in accordance with ASTM A 120, A135, A795 and A 53. Piping with minimum wall thickness outlined in NFPA shall be used for pipe sizes greater than 2". Schedule 40 pipe may be used for smaller sizes. 2.2 FITTINGS (INSIDE PIPING) A. Pipe shall be joined with cast iron or malleable iron, screwed, flanged or welded steel fittings manufactured in accordance with NFPA or U.L. listed fittings suitable for grooved pipe couplings. Plain end pipe fittings will not be accepted. B. Sprinkler drops may be installed using U.L.listed flexible stainless steel tubing

3 2.3 HANGERS A. Suitable U.L. listed hangers shall be provided in accordance with NFPA VALVES A. OS & Y valves, gate valves, drain valves, post indicator valves and check valves shall be listed by U. L. for use in sprinkler systems. B. Provide a tamper switch on the post indicator valve for connection to the fire alarm system. 2.5 UNDERGROUND PIPING A. Underground piping shall be cement lined ductile iron pipe manufactured in accordance with ANSI B. Joints in ductile iron water pipe shall be Tyton joints except that joints at fittings shall be bolted mechanical joints. 2.6 FITTINGS AND COUPLINGS (UNDERGROUND PIPING) A. Fitting for underground piping shall be cast iron manufactured in accordance with ANSI A BACKFLOW PREVENTION VALVES A. Double check detector valve assembly shall be Watts 709 DCDA double check valve with detector CFM meter, two OS & Y gate valves and four test cocks. B. Valves shall have epoxy coated cast iron bodies. The valve assembly shall be U. L. listed. C. Valves shall be as manufactured by Watts or approved equal by Ames, Febco or Hersey. 2.8 SPRINKLERS A. Sprinklers in areas having no suspended ceilings or having gypsum board ceilings fasten directly to the bar joist shall be standard upright, 1/2" or extended coverage 3/4" U.L. listed types having brass finish. B. Sprinklers in lay-in ceilings shall be standard small frame surface mounted pendant 1/2" or extended coverage 3/4", U.L. listed types having a chrome finish arranged for surface mounting

4 C. Sprinklers in suspended gypsum board ceiling shall be standard small frame %2" or extended coverage 3/4" U.L. listed concealed type with round cover. D. Sprinklers having an ordinary temperature rating shall be used except in mechanical equipment rooms and near duct outlets where sprinklers having an intermediate rating shall be used. E. Sprinklers shall be located in lay-in ceiling tiles in the center of the 24" X 48" tile or at quarter points in the tile, i.e. 12" from one end and 12" from each side. Sprinkler heads shall be arranged symmetrically in each space. Shop drawings shall indicate location of sprinkler heads in ceiling grid and shall show dimensions from sprinkler head to grid system. F. The sprinklers in the freezer, cooler, and the outside area at the can wash shall be ordinary temperature rated U.L. listed dry pendant types with minimum 12" long bodies, sealed in the ceiling as detailed on the drawings. Install %2" thick foam insulation on the first 24" of pipe from the sprinkler head. G. Install wire guards on each sprinkler head in the Gymnasium and Locker Rooms area. H. A stock of at least 6 spare sprinklers of each type used and a wrench shall be provided in a suitable accessible cabinet in the main valve room of each building. 2.9 INSPECTORS TEST VALVES A. Inspectors test valves shall be located at each sprinkler riser and shall discharge into the main sprinkler drain ESCUTCHEON PLATES A. Escutcheon plates having a chrome finish shall be provided for all exposed wall and ceiling penetrations. Where sprinklers are within 12 inches of surface mounted lighting fixtures, 1 inch deep plates shall be used for standard surface mounted pendent sprinklers

5 PART 3 - EXECUTION 3.1 UNDERGROUND PIPING A. Underground piping which is used for fire protection shall be installed by a contractor which holds a Georgia Certificate of Competency for Automatic Fire Sprinkler Systems. B. Underground piping shall be installed in accordance with NFPA through 8-7. All tees, plugs, caps and bends shall be anchored with clamps, tie rods and concrete thrust blocks in accordance with NFPA Piping shall have a minimum of 42" cover above the top of the pipe. C. Underground piping shall be thoroughly flushed in accordance with NFPA prior to the connection of inside piping. All piping shall be hydrostatically pressure tested at 200 psi for at least two hours in accordance with NFPA The joint Owner-Contractor inspection and test certificates shall be satisfactorily completed and submitted in accordance NFPA-24-A A. The sprinkler system shall be coordinated with and arranged to clear all ceiling grid, lighting fixtures, conduit ceiling diffusers, ductwork, piping and mechanical and electrical equipment as shown on the drawings. B. Sprinkler piping shall not be installed in service areas of air conditioning units. See drawings for details locating the service areas. Where conflicts occur, provide offsets in the sprinkler system piping. C. Sprinkler piping shall not be installed over the tops of electrical panels and switchboards in areas where piping is prohibited by the National Electrical code. D. A sign or placard shall be permanently affixed in the main valve room stating, "The sprinkler system's pipe sizes have been calculated to provide a density of.10 gpm per sq. ft. for 1,500 sq. ft.". E. A drawing framed under plastic showing the areas of the building served by each sprinkler zone shall be installed in the main valve room adjacent to the riser. End of Section