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- CROSS-AUS Newsletter 1 (2)
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CROSS regions
Structural safety of reinforced autoclaved aerated concrete (RAAC) planks

A Theme Page to raise awareness of and encourage knowledge sharing on the structural safety of RAAC planks.
CROSS Theme Page
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
Dangerous design of a retaining wall
Serious errors were made in the input to a computer program used for designing a 1.8m high retaining wall.
29 March 2021
CROSS Safety Report
Report ID: 989
Region: CROSS-UK
Contractor notches steel transfer beam
A transfer beam with 50mm thick flanges supporting a four-storey building was notched, without approval from the design engineer, to accommodate suspended ceiling fixings.
29 March 2021
CROSS Safety Report
Report ID: 829
Region: CROSS-UK
The risk of collapse of multi-storey CLT buildings during a fire
A reporter presents concerns about the fire safety of multi-storey buildings comprised of cross-laminated timber (CLT) structures.
29 March 2021
CROSS Safety Report
Report ID: 966
Region: CROSS-UK
Major safety defects in hospital
A number of construction defects were found in a hospital following the inspection of the external wall system.
29 March 2021
CROSS Safety Report
Report ID: 826
Region: CROSS-UK
Share your knowledge
Your report will make a difference. It will help to create positive change and improve safety.
Our secure and confidential safety reporting system gives professionals the opportunity to share their experiences to help others.
Steelwork splices do not match design calculations
Remedial works had to be carried out after it was found that steelwork splices on site did not match calculations which were retrospectively provided by a contractor.
29 March 2021
CROSS Safety Report
Report ID: 916
Region: CROSS-UK
Reinforced autoclaved aerated concrete in roofing in schools
This document is for building owners to help them to identify the presence of reinforced autoclaved aerated concrete (RAAC) and to check whether any further investigation or action is needed.
10 February 2021
Third party content
Publisher: Department for Education
Lessons learned from the 2018 Florida bridge collapse during construction

This was a bridge of an unusual design and was being constructed in an unusual manner. The main 53m pre-stressed pre-cast concrete span truss was in position when cracks appeared at a node and over a period of almost three weeks they visibly worsened until collapse occurred.
1 December 2020
CROSS Safety Alert
Region: CROSS-UK, CROSS-US
Workmanship in domestic buildings
A reporter has raised concerns after discovering a steel beam on site had its web cut away at the support without approval from the design engineer.
14 October 2020
CROSS Safety Report
Report ID: 971
Region: CROSS-UK