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In the past year, CROSS-UK has received and published more Safety Reports than we can feature in full in our regular Newsletter.
Below is our selection of Reports focusing on structural safety from the past twelve months, some of which you may have missed the first time around.
Whether they identify potential hazards or describe near misses, each Report offers insights that contribute to our shared understanding of structural safety.
Extreme miscalculation for shear in a high rise building
A reporter was provided with detailed calculations for a twin wall system for a high rise residential block. On close inspection, the unit of measurement used to determine the shear stress was found to have been miscalculated.
RAAC design assumptions – use of original manufacturers’ data can be misleading
The reporter’s organisation is aware that some engineers have misunderstood the purpose of the original manufacturers’ load span tables when assessing existing reinforced autoclaved aerated concrete (RAAC) installations.
Incorrect manufacture of steel reinforcement
During a site visit, a reporter noticed that heavy shear links had been installed with their C and D legs approximately 50% of the designed leg length, resulting in the total bar length being 20% shorter than specified.
Confusion between permissible stress and yield stress led to bridge demolition
A structural and civil engineer, while checking an appraisal of an existing bridge, found that the reinforcement permissible stress value had been used instead of the yield stress. This error led to the unnecessary demolition of the bridge.
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