CROSS Safety Report
Failure of fabricated access staging board
This report is over 2 years old
A member of a team working on a major bridge reported a close call after the supporting mesh flooring on a new access staging system gave way under his foot.
Key Learning Outcomes
For construction professionals:
Quality assurance and competent supervision on site can help to ensure that the structure is built in accordance with the design
Consider introducing a quality control procedure for the inspection of safety critical elements being delivered to ensure they match what is specified on the construction drawings
It is good practice to inspect and test any walkway system prior to it being commissioned on site
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A member of a team working on a major bridge reported a close call after the supporting mesh flooring on a new access staging system gave way under his foot. This failure of the flooring mesh could have resulted in a serious incident. The access staging was being installed as part of a new system which had recently been fabricated and certified by specialist suppliers for maintenance purposes.
The primary structural components of the system were globally load tested locally prior to their use and found to pass. However preliminary investigations indicate that the mesh flooring system provided differed significantly from that designed, commissioned and certified as having been supplied and this has had a direct bearing on the load bearing capabilities of the system.
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Expert Panel Comments
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As for report 672 (and many others) a generic issue for designers is to be sure that what is built is what they thought they had designed. A proper quality assurance (QA) scheme should assure a client that what is being provided matches the design intent.