Structural Safety Information and Reports

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RAAC planks in a 1970s shopping centre

An existing large shopping centre built circa 1975 had a number of external storerooms and loading bays with roofs constructed using reinforced autoclaved aerated concrete (RAAC) planks. The planks had deflected to the extent that they needed replacing.

Frustration about getting a response to a public safety concern

A member of the public reported a partially collapsed retaining structure to bodies they believed could be the responsible authority. Despite continued efforts to get attention to the issue, there was no apparent action to address the concern. This raised the reporter’s concern for public safety.

Further example of incorrect finite element modelling

Concerns in respect of the sufficiency of finite element modelling of masonry walls as part of a reinforced concrete framed building.

Excessive surcharge at the back of a retaining wall

A reporter raises concerns about excessive surcharging at the top of a small retaining wall which was supporting the garden of the property.

Collapse of external brick wall during demolition works

A section of an external brick wall of a building collapsed suddenly and unexpectedly part way through a demolition contract.

Concerns over old wall misuse

A reporter is concerned about the stability of a boundary wall after a neighbour carried out works adjacent to it.

Inadequate design for basement works

An inadequate structural design for alterations to a basement led to structural distress within a substantial five-storey townhouse.

Slipform temporary works design

A reporter was performing a CAT III check on a 14 storey slipform design when they discovered that the temporary works design was inadequate.

Reinforced aerated autoclaved concrete planks found on pitched roof of 1990s hospital building

A building constructed in the early 1990s has been found to contain reinforced aerated autoclaved concrete (RAAC) planks. This date is important since it is much later than the previously thought last significant use of RAAC in buildings in the UK and potentially affects the scope of buildings that could require screening for RAAC problems.

Stone cladding panel concerns

A reporter is concerned in respect of the risk of failure of stone cladding panels.

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RAAC planks in a 1970s shopping centre

Frustration about getting a response to a public safety concern

Further example of incorrect finite element modelling

Excessive surcharge at the back of a retaining wall

Collapse of external brick wall during demolition works

Concerns over old wall misuse

Inadequate design for basement works

Slipform temporary works design

Reinforced aerated autoclaved concrete planks found on pitched roof of 1990s hospital building

Stone cladding panel concerns

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