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Structural safety of reinforced autoclaved aerated concrete (RAAC) planks
A Theme Page to raise awareness of and encourage knowledge sharing on the structural safety of RAAC planks.
Temporary movement joint in slabs not installed correctly
Dowels in temporary movement joints for a slab were not installed correctly, impacting the structural behaviour.
Contractor notches steel transfer beam
A transfer beam with 50mm thick flanges supporting a four-storey building was notched, without approval from the design engineer, to accommodate suspended ceiling fixings.
The risk of collapse of multi-storey CLT buildings during a fire
A reporter presents concerns about the fire safety of multi-storey buildings comprised of cross-laminated timber (CLT) structures.
Major safety defects in hospital
A number of construction defects were found in a hospital following the inspection of the external wall system.
Steelwork splices do not match design calculations
Remedial works had to be carried out after it was found that steelwork splices on site did not match calculations which were retrospectively provided by a contractor.
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Reinforced autoclaved aerated concrete in roofing in schools
This document is for building owners to help them to identify the presence of reinforced autoclaved aerated concrete (RAAC) and to check whether any further investigation or action is needed.
Workmanship in domestic buildings
A reporter has raised concerns after discovering a steel beam on site had its web cut away at the support without approval from the design engineer.
Swimming pool ceiling collapses
A reporter writes about the collapses of two swimming pool ceilings due to failure of the fixings.
Inadequate punching shear reinforcement in flat slabs
This report highlights how remedial works were required in a number of residential buildings after inadequate punching shear reinforcement was identified.