Document Status
Current
Supplement
Civil & Structural Supplement
Series
Procedure and Advice Guidance
Abstract
Provides guidance on when and how to risk assess the frequency of inspections for bridges and other major road structures, using the Principal inspection interval risk assessment (PIIRA) process.
History
First published: 19 December 2025.
Subjects
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Roads
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Civil engineering, infrastructure and public utilities
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Transport facilities
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Bridges
Publisher History
The Welsh Government is the devolved government for Wales. They publish a number of strategies, policies, consultation papers, circulars, leaflets and posters. Previously known as Welsh Assembly Government.
Information
NBS
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.
Accuris
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