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•�" � 2. Structure must conform to ASTM C-478, Standard Specifications for <br /> Precast Reinforced Manhole Sections and all local codes. . <br /> 2.08 CAST IRON FRAMES, GRATES AND COVERS <br /> A. Castings shall be of the type, style, weight, and size indicated on the <br /> plans. <br /> B. Castings shall be of uniform quality, free from blowholes, shrinkage, <br /> distortion or other defects. They shall be smooth and well cleaned by <br /> shot blasting. Component parts shall fit together in a satisfactory <br /> manner. Round frames and covers shall have continuously machined <br /> bearing surfaces to prevent rocking. <br /> C. Metal shall conform to ASTM A48-76 Class 35 for grey iron, or ASTM <br /> A536-80 Grade 65-45-12 for ductile iron. . <br /> PART 3: EXECUTION <br /> 3.01 FIELD QUALITY CONTROL <br /> A. Pressure test all piping systems 'and maintain pressure until piping is ' � <br /> covered or insulated. ' � <br /> B. Comply with tests and inspections required by code. <br /> C. See Submittals, Paragraph 1 .03 in this Section. <br /> D. Flush and test sprinkler service main. � <br /> 1 . Complete and return test forms. • <br /> - E. Provide static and residual pressure test results of water system before � <br /> starting construction. - <br /> F. Provide Sterilization Test Approval for domestic water main. <br /> 3.02 EXCAVATION AND BACKFILLING . , . <br /> A. Excavate as required to install pipes, tanks and equipment to the depth <br /> shown on plans or required for proper operation. <br /> � B. Construct shoring and bracing in accordance with Local , State and <br /> Federal safety regulations that apply as required to protect trench <br /> construction, adjacent buildings and property as well as the safety of <br /> employees and public. <br /> C. Provide temporary bridges where required to maintain traffic. <br /> D. Excavations shall be kept free of water during construction. Should the <br /> soils become softened by ground water or surface runoff, the soft <br /> material shall be removed and replaced with suitable material . Compact <br /> in lifts of 9 inches. <br /> E. Provide and maintain acceptable safety barriers and warning lights to <br /> eliminate hazard to public, construction and owner's personnel . <br /> � � <br /> 02700-4 <br /> 191/1006. 1 <br />