CROSS Safety Report
Deflection of bridge girder under load
This report is over 2 years old
Overview
A report was received from a bridge examiner to say outer main girder of a short span railway bridge was moving up to 30mm under load.
Key Learning Outcomes
For asset owners and managers:
-
This report demonstrates how regular inspections can help identify any safety issues that may need to be addressed
-
A strict inspection and maintenance programme can also help keep a structure safe and operational
Full Report
Find out more about the Full Report
The Full Report below has been submitted to CROSS and describes the reporter’s experience. The text has been edited for clarity and to ensure anonymity and confidentiality by removing any identifiable details. If you would like to know more about our secure reporting process or submit a report yourself, please visit the reporting to CROSS-UK page.
A report was received from a bridge examiner to say outer main girder of a short span railway bridge (Figure 1) was moving up to 30mm under load. The girder was reported to be rocking outwards at the bottom flange which was indicated by the handrail moving inwards towards the running rail.
The girder was also pumping under load at both abutments. Subsequent strengthening consisted of three underslung beams spanning between the edge girder and centre main girder with two beams spanning the abutments supporting the trough decking directly under the rail (Figure 2). A new deck is planned.
Submit a report
Your report will make a difference. It will help to create positive change and improve safety.
Our secure and confidential safety reporting system gives professionals the opportunity to share their experiences to help others.
Feedback
No feedback has yet been published for this page.
Expert Panel Comments
Expert Panels comment on the reports we receive. They use their experience to help you understand what can be learned from the reports. If you would like to know more, please visit the CROSS-UK Expert Panels page.
There are no Expert Panel comments on this report. The Expert Panels are only asked to comment on selected reports. These are normally reports where there is an opportunity for them to help you understand what can be learned from the report.