Webinar: Permissible Limit State Analysis of Highway Masonry Arch Bridges with LimitState:RING

9th July 2025 | 12:30 - 13:00 BST

This webinar explores the technical principles and practical application of Permissible Limit State (PLS) analysis for the assessment of masonry arch bridges, as implemented in LimitState:RING 4.

PLS analysis offers a practical complement to Ultimate Limit State (ULS) methods, assessing a bridge’s capacity to carry routine traffic without the development of incipient failure mechanisms. Aligned with the latest guidance from CIRIA C800 and National Highways CS 454, this approach enables engineers to verify structural adequacy under day-to-day loading conditions, helping to prevent excessive distress and safeguard long-term service life.

Key topics covered include:

• The theoretical basis of PLS and the key differences from ULS assessments.

• How LimitState:RING 4 seamlessly incorporates PLS analysis parameters.

• Interpretation of PLS results alongside ULS outputs to inform decisions on load carrying capacity, asset condition, and maintenance prioritisation.

Live demonstrations using LimitState:RING 4 will show how PLS assessments are defined, solved, and interpreted in practice.

This session is ideal for engineers, consultants, and asset managers seeking a deeper understanding of PLS methods and their application to our heritage bridge infrastructure.

All registrants will be sent a link to a recording of the webinar in the days following the event.