1 October, 2014
  • Designation:
  • Type:
    Non-reinforced concrete, reinforced concrete and concrete with steel fibres
  • Norm:
    CE EN 1917
  • Application:
    They allow access and aeration of drainage systems or sewage for routing wastewater, storm waters and surface waters by gravity or occasionally at low pressure, predominantly installed in the underlying areas of vehicle and/or pedestrian traffic;


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