Civil & Structural Supplement
Provides guidance for selecting combinations of drainage pipes and bedding types to meet loading requirements. Covers the design approach and looks at the range of bedding types, loadings on pipes and during construction, settlement, rigid pipe design, bedding factors, and flexible pipe design.
Drainage. Design. Supersedes CD 533 Determination of pipe and bedding combinations for drainage works (formerly HA 40/01). Revision 1 (HE, 2020). Supersedes CD 533 Drainage. Design. Determination of pipe and bedding combinations for drainage works (formerly HA 40/01) (HE, 2019) and HA 40/01 Geotechnics and drainage. Drainage. Determination of pipe and bedding combinations for drainage works (HA, 2001). Design manual for roads and bridges (DMRB). Version 0 dated Dec 2019 - replaces HA 40/01. Version 1 dated Mar 2020 - updates references. Version 1.1.0 dated Dec 2021 - changes made to core document.
National Highways is a government company, with responsibility for operating, maintaining and improving motorways and major A roads in England. It works with the Department for Transport and was previously known as Highways England and Highways Agency.
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