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2 .2 .4 . Brine Main <br /> Preparation of Trench Bottom <br /> Pipe shall be laid directly on a trench bottom containing coupling holes and shaped to provide <br /> continuous contact with the pipe between coupling holes . <br /> Coupling Holes : <br /> Prior to lowering pipe into the trench, a coupling hole shall be dug in the trench bottom <br /> having a length, width and depth to allow assembly and to maintain a minimum clearance of <br /> two (2") inches between coupling and undisturbed trench bottom. <br /> Shaping Trench Bottom : <br /> Prior to lowering pipe into the trench, the trench bottom between coupling holes shall be cut <br /> true and even to grade so as to provide continuous contact of the trench bottom with the pipe <br /> in accordance with the bedding detail as shown on the Contract Plans . <br /> Lowering Pipe and Accessories into Trench <br /> Proper Per im lements, tools, and facilities satisfactory to the Engineer shall be provided by and used <br /> by the Contractor for the safe and efficient execution of the work. All pipe, fittings, and <br /> accessories shall be carefully lowered into the trench using suitable equipment in such manner as <br /> to prevent damage to pipe and fittings. Under no circumstances shall pipe or accessories be <br /> dropped or dumped into the trench. <br /> ' es shall be inspected for defects prior to lowering into trench. Any <br /> The pipe and accessories pec <br /> defective, damaged or unsound material shall be repaired or replaced as directed by the Engineer. <br /> Where the grade or alignment of the pipe is obstructed by existing utility structures, such as <br /> conduits, ducts, pipes, branch connections to main sewers, or main drains, the obstruction shall <br /> be permanently supported, relocated, removed or reconstructed by the Contractor in cooperation <br /> ' with Owners of such utility structures. <br /> ' No deviation shall be made from the required line of grade except with the written consent of the <br /> Engineer. <br /> ! Whenever necessary to determine the location of existing underground utility structures, the <br /> Contractor, after an examination of available records and upon written order of the Engineer, <br /> shall make all explorations and excavations for such purposes. <br /> 13 <br />