This document is available as part of the Construction Information Service. The Construction Information Service brings together a comprehensive collection of essential technical documents from a wide range of publishers in one online package. Covering all aspects of building, engineering, design and construction, it provides its users with a single source for all their technical information needs. Contact us today to find out how to become a subscriber to this indispensable service.

Drainage design. Chamber tops and gully tops for road drainage and services (formerly HA 104/09, IAN 196/17, IAN 197/17)

DMRB Volume 4 Section 2 CD 534

Drainage design. Chamber tops and gully tops for road drainage and services (formerly HA 104/09, IAN 196/17, IAN 197/17)

Document Status



Civil & Structural Supplement


DMRB Volume 4 Section 2


Details requirements for road chamber top and gully top installations on all-purpose trunk roads and motorways. Also covers the requirements for existing chamber tops in existing carriageways and the annexes include WRc skid test and a decision tree.


Version: 0.1.0. Supersedes CD 534. Version 0. Feb 2020. Supersedes HA 104/09, IAN 196/17 and IAN 197/17. Design manual for roads and bridges (DMRB) 4.2.5.


Publisher History

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.



NBS has produced specification systems and information products for construction industry professionals for more than 40 years. The National Building Specification is the recognised UK national standard and is used by over 5,000 organisations. NBS is part of RIBA Enterprises Ltd.

IHS Markit

IHS Markit is a leading global source of critical information and insight for customers in a broad range of industries. Our customer product and service solutions span four major areas of information: energy, product lifecycle management, environmental and security. By focusing on our customers first, we deliver data and expertise that enable innovative and successful decision-making. Customers range from governments and multinational companies to smaller companies and technical professionals in more than 180 countries. IHS has been in business since 1959 and employs more than 3,500 people in 35 locations around the world.

Request a quote

The Construction Information Service (CIS) gives subscribers 'the information advantage' in today's competitive market.

To request a quote, complete the form below, selecting your supplements of interest.

  • Core
  • Building
  • Construction Management
  • Mechanical and Electrical
  • Planning and Development
  • Civil and Structural

First name:
Email address: