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- CROSS-AUS Newsletter 3 (1)
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CROSS regions
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
RAAC assessment undertaken by persons not suitably experienced
A reinforced aerated autoclaved concrete (RAAC) assessment was carried out by persons who did not appear to have appropriate experience, potentially putting building users at risk of harm.
21 August 2023
CROSS Safety Report
Report ID: 1224
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
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
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
Waterproofing exposed concrete slabs
This report highlights that water ingress into buildings continues to be a problem and discusses the role of the structural engineer when dealing with waterproofing of exposed concrete slabs. It shows how this can be achieved by careful design and detailing of the reinforced concrete structure and by close collaboration of all parties involved.
25 November 2021
CROSS Safety Report
Report ID: 959
Region: CROSS-AUS
Removal of internal structure
The roof trusses, 6m above the ground floor, had been left supported on props made by nailing floor joists together; one at each party wall position.
1 July 2006
CROSS Safety Report
Report ID: 46
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
Design of head track in cold formed steel framing
The reporter noticed that the in-house structural engineer for the steel frame company had not taken account of all the loads in the design of the head track.
1 November 2006
CROSS Safety Report
Report ID: 39
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