A Newsletter from CROSS-UK containing reports on structural safety issues.
Note: this Newsletter was published by CROSS (Confidential Reporting on Structural Safety). Since March 2021, Confidential Reporting on Structural Safety is renamed Collaborative Reporting for Safer Structures (CROSS).
Newsletter content
Tower crane - failure of loadbearing part
A tower crane suffered a failure of one of its four main legs approximately 12m below the slew ring.
Application of wind load code BS EN 1991 - wind actions
A reporter's concern is about the application of the wind load code BS EN 1991-1-4: 2005 Eurocode 1: Actions on structures - Part 1-4.
Freeze/thaw effects on RHSs and unexpected hydrogen generation
A reporter provides their views of the freezing effects on rectangular hollow sections (RHSs) and how this could be related to Liquid Metal Assisted Cracking.
Snow sliding off industrial building roofs
A lean-to roof at lower level than the main roof of a large industrial building collapsed and ground level equipment was damaged due to a sliding snow.
Computer analysis and slab design twisting moments
A reporter has noticed on many occasions when checking reinforced concrete and post-tensioned slab designs that engineers often neglect to consider twisting moments when arriving at slab design moments.
Two tier stacked site cabin blown over
A two-tier stacked site cabin was blown over in the wind with someone inside – thankfully they were not injured.
Failure of load test setup
A load test setup used to test a composite steel girder failed due to over estimation of the capacity of the supporting member.
Issues with imported steel
Defective steel, says a reporter, was found in a major retail store where the material had been imported from a supplier overseas.
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