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The documents for risk management and assessment of concrete bridges with half-joints, concrete bridges with deck hinges and post-tensioned concrete bridges in the Design Manual for Roads and Bridges (DMRB) have been rewritten and updated as part of a project to update the entire DMRB suite of documents; they have also been given the new document codes CS 465, CS 466 and CS 467. In bringing these documents up to date there have been significant technical changes introduced, including: a change to the risk management process for half-joints and deck hinges; an update of assessment methods for evaluating half-joints and deck hinges; and improvements to the risk management of post-tensioned bridges. This technical paper outlines the technical background to the key changes and highlights some of the improvements and efficiencies that can be delivered using the new documents.

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The documents for structural assessment of highway bridges, bridge substructures, retaining structures and buried structures in the UK's Design Manual for Roads and Bridges have been rewritten and updated. In bringing the documents up to date, there have been several technical changes introduced. These include efficiencies in the traffic loading model for bridges, new content on masonry arch assessment and new approaches to the assessment of substructures, retaining structures and buried structures using a Eurocode-aligned basis of assessment. This paper outlines the technical background to the key changes and highlights some of the efficiencies that can be delivered using the new documents. In addition, the paper outlines how the documents connect with related documents, including those on structural review, assessment of abnormal traffic loads, assessment of impact on bridge piers and the management of substandard structures.