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SERIES 500 Grassed Surface Water Channels 37 DRAINAGE …
www.standardsforhighways.co.ukSpecification for Highway Works Drainage and Service Ducts DRAINAGE AND SERVICE DUCTS 500 (02/20) Introduction 1 (02/20) This Series is part of the Specification for Highways Works. Whilst this Series is particularly relevant to the subject matter in its title it must be read in conjunction with the general requirements in Series 000 and 100 and
SERIES NG 500 DRAINAGE AND SERVICE DUCTS
www.standardsforhighways.co.ukAmendment – 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 …