INSTALLATION OF PIPE, FITTINGS AND APPURTENANCES 1. Pipe, fittings, and appurtenancesshall be installed per manufacturer's printed instructions. Care shall be taken to ensure that no joints are made with uneven or rough edges. Pipeline deflection must be kept within the manufacturer's recommended deflection tolerance. Pipe and fittings shall be carefully handled and lowered into the trench. Special care shall be taken to ensure that each length shall abut against the next in such a manner that there shall be no shoulder or unevenness of any kind along the inside of the pipe. Where the contractor proposes to deviate from the specified instructions, the proposed deviation shall be submitted for approval. 2. All pipes shall be bedded on a solid foundation prior to backfilling. Before pipe is placed, the bottom of the trench shall be carefully shaped to fit the lower part of the pipe exterior with reasonable closeness for width of at least 60% of the pipe width. Bell holes shall be dug sufficiently large to insure the making of proper joints and so that after placement, only the barrel of the pipe receives bearing pressure from the trench bottom. No pipe shall be brought into position until the preceding length has been thoroughly bedded and secured in place. Any defects due to settlement shall be made good by the Contractor. 3. Pipe and fittings shall be kept clean until final acceptance of the work. All open pipe ends shall be provided with plugs to keep dirt, water and other materials from entering. This plug shall be kept in place when actual pipe laying is not in progress. 4. Excavation and backfill for pipes and appurtenances shall be in accordance with the applicable DelDOT specifications. 5. The Contractorshall not install pipe on frozen or frost penetrated subgrade. When directed, the Contractor shall install pipe on artificial foundations. Such foundation may consist of gravel or concrete and shall be to the dimensions and in the manner directed by the Engineer. Refer to the applicable DelDOT specifications.
