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