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M 29. All exposed metal including pipe and fittings requirements of the Indian River County Utility 1, by the IRC Utility Department. r 30. All 16" gate valves shall be side actuated. shall be painted in accordance with the Department. Color shall be as selected 31. Transition from PE to Ductile Iron shall be made with a mechanical joint adapter per the PE Pipe Manufacturer's Recommendations and Specifications. W D. Restrained Joints 1. Restrained joints shall be used on lines larger than 6" diameter. Sections of piping i' having restrained joints or those requiring restrained joints shall be constructed using pipe and fittings with restrained "Locked -type" joints and the joints shall be capable of holding against withdrawal for line pressures up to 150 pounds per square inch (psi). The pipe fittings shall be as shown for restrained push -on joints or restrained mechanical joints on Page 416 in Section VI, in the Handbook of Cast Iron Pipe, O' Edition. 2. Restrained pipe shall have a minimum wall thickness at the point of cutout that corresponds with the minimum speed wall thickness for the rest of the pipe. ,r 3. Bolts and nuts for restrained joints shall be hot dipped galvanized, low alloy, high strength steel. • 4. The Contractor shall also provide restrained joints in accordance with the above criteria wherever thrust blocks are used in conjunction with below ground fittings on lines 12" in diameter or less. r E. Earthwork and Backfill 1. All excavation shall be adequately guarded with barricades and lights, so as to protect WO the public from hazard. Streets, sidewalks, driveways, curbs, parkways, and other public property disturbed in the course of the work shall be restored in a manner satisfactory to the County. • 2. Foundation material used for pipe bedding, from a minimum 6" distance below the pipe invert to the bottom 12" above the top of the pipe, shall be bank run sand and gravel. 3. All gravity sewer installation procedures must be in accordance with pipe manufacturer's recommendations. All gravity sewers and force mains shall be installed to have a minimum cover of 36 inches. Installation of gravity sewers shall be controlled by use of a laser to maintain proper grade. 4. Installation of force mains shall be in accordance with AWWA Standard C600 and the installation specifications for water lines in the water distribution section, irrespective of the type of pipe selected. 4.1 Trench — Trench width shall be kept to a minimum necessary for installation of the pipe. The trench bottom shall be graded uniformly to match the slope of pipe. W W