1999-338A - Laserfiche WebLink

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• r placement, lubrication, bolt torque, field cutting/trimming, and pushing/pulling methods for joint assembly. ¢ " 2) Prior to placing in the trench, each pipe section, joint, and fitting j shall be checked for damage or defects such as cracks, blisters, coating/lining separation, gouges, and the like. Any " damage or defective materials found shall not be installed unless l approved by the Engineer, and shall be marked "REJECTED" and immediately removed from the work site. f 3) Prior to installation, the interior of all pipe and fittings shall j be inspected for debris, sediment accumulation, sand, and the like, and shall be cleaned as required to remove such foreign 4 matter. Joint surfaces such as gaskets, gasket grooves, spigots, _ and bells shall be cleaned of sand and grit prior to joining. 4) Gasket lubricants shall be stored and applied in a manner that will prevent significant contamination or pick-up of sand and grit. I 5) The pipe spigot shall be centered in and aligned with its mating bell prior to insertion and forced evenly in a straight line to seating depth, taking tare not to over -bell the joint. Where required, deflections shall be made after the joint is seated. 6) Joining shall generally be done by hand or by push -bar with a cushion block whenever pipe size and weight permit. When a t mechanical pushinKpulling device such as chain -puller, come - along, and the like is required, the device shall be used in a manner that will not deform gouge, chip, or otherwise damage the pipe or cause significant disturbance of the prepared bedding. In no case shall joints be made by "popping - on" or swinging the spigot into the bell to seat the joint. i 7) Fittings and appurtenances shall be fully, independently supported. k-' on the bedding or on a permanent foundation so as not to bear on the pipe upon completion of the installation. S) The installed piping system shall be kept free of dirt, trench water, and other foreign matter during the progress of the work, and all open ends of the line shall be sealed with watertight plugs whenever work is not in progress. 9) Empty installed pipe shall be secured against flotation due to potential trench flooding by timely placement of suffleient backfill j or approved anchoring devices sufficient to resist pipe buoyancy. k.. M INSTALLATION OF FITTINGS A. Fittings, plugs, and caps shall be set and jointed to pipe in the manner heretofore specified for cleaning, laying and jointing pipe. 11. INSTALLATION OF DRAINAGE STRUCTURES A. Excavation for drainage structures shall be of sufficient size to permit construction of the structure to progress without hindrance from die walls of the excavation or from sloughed materials. No less than 12 inches clearance shall be provided between excavation walls and walls of the structure. If soil conditions encountered at the bottom of the excavation would in the sole opinion of the Engineer be unsuitable for 2Q.7 L