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Punching shear in concrete slabs at perimeter columns
A reporter raises concerns about the underestimation of bending moments in perimeter columns when assessing punching shear in adjacent concrete slabs. Punching shear failures can be brittle and catastrophic. Designers need to include the appropriate ultimate moment in the design actions.
14 October 2022
CROSS Safety Report
Report ID: 1122
Region: CROSS-AUS
Failure of cantilevered stone staircase
During the renovation and change-of-use conversion of a former minor stately home built around 1830, under pedestrian loading, a ‘cantilevered’ stone staircase partially collapsed without warning.
21 February 2023
CROSS Safety Report
Report ID: 1147
Region: CROSS-UK
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.
20 February 2023
CROSS Safety Report
Report ID: 1145
Region: CROSS-UK
Temporary movement joint in slabs not installed correctly
Dowels in temporary movement joints for a slab were not installed correctly, impacting the structural behaviour.
29 March 2021
CROSS Safety Report
Report ID: 998
Region: CROSS-UK
Punching shear design spreadsheets
This is a technical note from a reporter about the methods their firm uses for punching shear design because there was concern about punching shear design spreadsheets possibly leading to potentially unsafe situations. .
28 March 2023
CROSS Safety Report
Report ID: 830
Region: CROSS-UK
Construction period of RAAC planks
A reporter says that there are structural issues with reinforced autoclaved aerated concrete (RAAC) panels installed in a building as late as 1998. This date is significantly later than previous reports suggest as the last significant use of RAAC elements in the UK.
20 February 2023
CROSS Safety Report
Report ID: 954
Region: CROSS-UK
Thermal effects on long span concrete car park beams
A reporter describes how long span precast hollow core units in a car park started to bow upwards due to thermal effects.
1 October 2010
CROSS Safety Report
Report ID: 173
Region: CROSS-UK
Compatibility at RC column to slab joint - strong column/weak slab
A reporter who was reviewing the structural design of a commercial building raises concerns over the compatibility at column/slab joints when different grades of concrete are used.
1 April 2012
CROSS Safety Report
Report ID: 296
Region: CROSS-UK
Design responsibility for temporary stability of steel frame building
A reporter raises concerns about the division of responsibility for the temporary stability of a four-storey steel frame structure with precast concrete planks and a structural topping.
1 April 2019
CROSS Safety Report
Report ID: 789
Region: CROSS-UK
Unconservative design of flat slab due to software modelling issues
A reporter discusses how a design/modelling problem caused an under-designed reinforced concrete (RC) slab to be constructed.
1 April 2020
CROSS Safety Report
Report ID: 886
Region: CROSS-UK
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