And Bedding Combinations For Drainage Works

SERIES NG 500 DRAINAGE AND SERVICE DUCTS

Amendment – February 2020 4 Volume 2 Series NG 500 Notes for Guidance on the Specifications for Highway Works Drainage and Service Ducts NG 504 (02/20) Jointing of Pipes 1 (02/20) Pipe joints for surface water drains, unlike foul drains, do not always have to be completely watertight. Small amounts of seepage as allowed in sub-Clause 509.7 can be …

  Work, Drainage, Works drainage