This chapter is primarily concerned with the drafting of specification clauses covering the provision, laying and jointing of sewers and drains in a variety of materials. The specification will also pick up associated operations such as excavation, timbering, backfill, etc., of sewer trenches, concrete protection to pipes and testing pipes. Where large-diameter sewers are to be laid in tunnel, the provision, jointing and grouting of shaft and tunnel segments will probably arise.
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