查看标准

适用范围：BS EN 1917 specifies requirements and describes test methods forprecast concrete manholes of circular, rectangular (with or withoutchamfered or rounded corners) or elliptical cross‑section, unreinforced,steel fibre and reinforced, with nominal sizes or nominal lengthsnot exceeding DN 1250 or LN 1250, respectively. The intended use ofBS EN 1917 is to permit access to, and to allow aeration of, drain orsewer systems for the conveyance of sewage, rainwater and surfacewater under gravity or occasionally at low head of pressure, mainlyinstalled in areas subjected to vehicular and/or pedestrian traffic.This part of BS 5911 specifies complementary requirements to thosein BS EN 1917 for unreinforced and reinforced concrete manholesof circular and rectangular cross‑section (with or without chamferedor rounded corners), as provided for in BS EN 1917, i.e. units withnominal sizes or nominal lengths not exceeding DN 1250 or LN 1250,respectively. Full requirements for unreinforced and reinforced concretemanholes with nominal sizes greater than DN 1250, but not exceedingDN 3000, are also specified. The manholes are intended to be installedin carriageways of roads (including pedestrian streets), hard shouldersand parking areas for all types of road vehicles, though provision isalso made for units subject to lighter traffic loading. Requirements forsoakaways, landing slabs and corbel slabs are also specified.BS EN 752, BS EN 1295‑1 and BS EN 1610 deal with the planning,design, installation and testing of drains and sewers.