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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
Accidental partial demolition of a beam
During a site visit, the permanent works design engineer noticed that hydro-demolition of the end of a floor supporting beam had taken place out of sequence. This introduced a pattern of bending moments and shear forces that were not considered in the original design.
6 April 2023
CROSS Safety Report
Report ID: 855
Region: CROSS-UK
Precast concrete planks - durability and potential safety concerns
A reporter raises concerns over the recent collapses of precast concrete floor units that are installed throughout the UK.
1 April 2007
CROSS Safety Report
Report ID: 77
Region: CROSS-UK
Concrete half joints
Poor reinforcement detailing and installation in a half joint led to the collapse of a series of beams and precast concrete slabs.
1 January 2008
CROSS Safety Report
Report ID: 88
Region: CROSS-UK
Missing rebar identified prior to concrete slab pour
A reporter describes how they often encounter issues such as missing reinforcement while carrying out pre-pour inspections.
1 January 2013
CROSS Safety Report
Report ID: 310
Region: CROSS-UK
Failure of precast concrete cover slab to circular shaft
A reporter describes how several precast concrete cover slab units collapsed shortly after being installed.
1 April 2015
CROSS Safety Report
Report ID: 505
Region: CROSS-UK
Balcony construction defects of residential flats
A reporter's firm have been undertaking structural assessments of cantilevered reinforced concrete walkways, which in the majority of cases have been found to be under strength.
1 April 2014
CROSS Safety Report
Report ID: 435
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
Missing punching shear reinforcement in concrete slabs
A reporter raises concerns of how two separate engineers observed the omission of design punching shear reinforcement prior to slab pours being undertaken on two different sites.
1 April 2020
CROSS Safety Report
Report ID: 906
Region: CROSS-UK
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.
14 October 2020
CROSS Safety Report
Report ID: 950
Region: CROSS-UK
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