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- CROSS-UK Newsletter 2 (1)
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- CROSS-UK [sub-heading only] (24)
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CROSS regions
Concerns about punching shear in a flat slab
This report concerns potential shear failures in flat slabs. This originates from inconsistent design and detailing of the shear reinforcement where a proprietary shear link system is assumed in the design but not followed in detailing.
13 December 2021
CROSS Safety Report
Report ID: 1050
Region: CROSS-UK
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
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
Correct uses of concrete spacers
A reporter raises concerns about how concrete strip spacers are being installed on some construction sites.
1 April 2013
CROSS Safety Report
Report ID: 321
Region: CROSS-UK
Falsework collapse during slab pour in SE Asia
There was a partial collapse of falsework on a project in Southeast Asia.
1 July 2013
CROSS Safety Report
Report ID: 337
Region: CROSS-UK
Boom MEPW falls through precast planks
A high injury potential near-miss (near hit) incident occurred when a mobile elevated working platform (MEPW) fell through a floor at a point where there was a notched precast plank.
1 April 2013
CROSS Safety Report
Report ID: 359
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
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
Plastic spacers in slabs
A reporter has spotted plastic rails about 1.5 m long being used to support the bottom rebar mat of a slab.
1 July 2015
CROSS Safety Report
Report ID: 431
Region: CROSS-UK
Computer analysis and slab design twisting moments
A reporter has noticed on many occasions when checking reinforced concrete and post-tensioned slab designs that engineers often neglect to consider twisting moments when arriving at slab design moments.
1 October 2014
CROSS Safety Report
Report ID: 441
Region: CROSS-UK
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