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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.
26 August 2022
CROSS Safety Report
Report ID: 1125
Region: CROSS-UK
Grouting of joints between load-bearing prefabricated concrete members
This report highlights the risk of failure if grouted joints between load-bearing prefabricated concrete members are not designed and installed correctly.
30 April 2021
CROSS Safety Report
Report ID: 961
Region: CROSS-AUS
Unstable concrete blocks
A reporter from a consulting firm was called to a site where the blocks in a retaining wall were found to be expanding and falling apart.
1 April 2010
CROSS Safety Report
Report ID: 174
Region: CROSS-UK
Gain in strength of mortar slower than concrete
A masonry wall settled and cracked after four courses of Engineering grade B bricks were substituted (not by the designer) for the original in-situ concrete padstones on cost and handling grounds.
1 April 2010
CROSS Safety Report
Report ID: 177
Region: CROSS-UK
Composition of new precast concrete blocks
A UK firm has raised concerns over a new large precast concrete block range which seems to use a wide range of secondary recycled aggregates in its mix, including some potentially hazardous waste.
1 July 2014
CROSS Safety Report
Report ID: 380
Region: CROSS-UK
Brick wall removed to leave precast panels unsupported
Precast concrete slabs were left unsupported after a supporting brick wall was removed during demolition works.
1 July 2014
CROSS Safety Report
Report ID: 384
Region: CROSS-UK
Safety concern about the design of thin concrete walls
The reporter raises their concern about the design of thin concrete load-bearing walls, sometimes supporting 10 or more storeys.
1 July 2019
CROSS Safety Report
Report ID: 815
Region: CROSS-AUS
Failure of precast concrete 'L' shaped retaining wall
A recent incident occurred on a site, where a temporary precast retaining wall failed leading to a pile of clay approximately 3m high spilling through the wall.
1 July 2014
CROSS Safety Report
Report ID: 433
Region: CROSS-UK
Near miss when modifying brickwork
A reporter’s experience of creating a new door opening in an existing brick wall on the first floor of an old building is not always as simple as it would appear.
1 February 2020
CROSS Safety Report
Report ID: 847
Region: CROSS-AUS
Design and erection of prefabricated (precast) concrete
A correspondent considers that there should always be an experienced temporary works designer for prefabricated concrete structures as many structural engineers do not consider the erection methodology when designing such structures.
1 February 2020
CROSS Safety Report
Report ID: 871
Region: CROSS-AUS
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