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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, CROSS-AUS, 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
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
Incorrect use of software for wind loads on solar panels
A reporter is concerned about designers relying completely on the output of software for structural analysis when they do not fully understand the requirements for data input.
7 November 2023
CROSS Safety Report
Report ID: 1212
Region: CROSS-AUS
Aerated concrete slabs
A reporter discusses the failure of precast reinforced autoclaved aerated concrete (RAAC) slabs during construction.
1 October 2007
CROSS Safety Report
Report ID: 55
Region: CROSS-UK, CROSS-AUS, CROSS-US
Photovoltaic installations - structural aspects
CROSS has concerns about some structural aspects of roof mounted PV and solar thermal panels.
1 November 2016
CROSS Safety Alert
Region: CROSS-UK, CROSS-AUS, CROSS-US
Failure of reinforced autoclaved aerated concrete (RAAC) planks
In late 2018, the Local Government Association (LGA) and the Department for Education (DfE) contacted all school building owners to draw attention to a recent failure involving a flat roof There was little warning of the sudden collapse.
1 May 2019
CROSS Safety Alert
Region: CROSS-UK, CROSS-AUS, CROSS-US
Condition assessments of exposed lightweight canopy roofs
Defects in lightweight canopy roofs, using underslung roofing sheets in many cases.
14 October 2022
CROSS Safety Report
Report ID: 1084
Region: CROSS-AUS
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