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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, CROSS-AUS, CROSS-US
Inappropriate material storage causes collapse of ceiling of a truck dock mezzanine
This report describes the collapse of an overloaded framed ceiling.
10 May 2021
CROSS Safety Report
Report ID: 983
Region: CROSS-US
Partial collapse of a shopping mall roof under drifting snow
Partial collapse of a shopping mall roof under drifting snow caused by lack of building code provisions for drifting snow and poor fabrication of open web steel joists.
2 May 2023
CROSS Safety Report
Report ID: 1009
Region: CROSS-US
Roof collapse of warehouse structure under rainwater ponding
This report highlights the structural risk caused by rainwater ponding on relatively flat roofs.
10 May 2021
CROSS Safety Report
Report ID: 969
Region: CROSS-US
Channel slab roof deck collapse during reroofing
This report highlights the structural risk caused by machinery during reroof a project.
10 May 2021
CROSS Safety Report
Report ID: 970
Region: CROSS-US
Erroneous design snow loading assumption for indoor sports facility causes structural distress
An indoor sports facility in a mid-western city suffered snow-related damage one winter. The shell reportedly exhibited visible deflections in several of the arches, causing the owners to close the facility.
2 May 2023
CROSS Safety Report
Report ID: 1012
Region: CROSS-US
Structural misunderstanding leads to historic church tower nearly being demolished
A historic church stands at the center of a charming town. Highlighted among many striking features is the iconic 170-foot (52m) bell tower, which looms over the town. For decades, the tower has become the centerpiece for cultural events in addition to being the original community center of worship.
2 May 2023
CROSS Safety Report
Report ID: 1013
Region: CROSS-US
Failure to maintain roof drainage during re-roof leads to ponding stability collapse
A roof collapsed while the building’s roofing membrane was being replaced.
1 March 2020
CROSS Safety Report
Report ID: 864
Region: CROSS-US
Rigid wall flexible diaphragm roof collapse in earthquake
Part of the roof of a one-story building in California collapsed during a 2019 earthquake.
1 March 2020
CROSS Safety Report
Report ID: 877
Region: CROSS-US
Reinforced autoclaved aerated concrete roof planks - sharing experiences
A reporter has surveyed a number of buildings with reinforced autoclaved aerated concrete (RAAC) roof planks and wants to share their experiences to help others.
1 April 2020
CROSS Safety Report
Report ID: 874
Region: CROSS-UK, CROSS-AUS, CROSS-US
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