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Risk of failure of untested vibration isolators with seismic restraint

Risk of failure of vibration isolators with integral seismic restraint being used without independent third party testing

7 November 2023

CROSS Safety Report

Report ID: 1230

Region: CROSS-AUS

Underpinning using screw piles

A reporter is concerned that inclined screw piles used for underpinning may be subjected to significant bending moments that compromise their capacity.

7 November 2023

CROSS Safety Report

Report ID: 1175

Region: CROSS-AUS

Collapse of folded plate timber roof at a school

This report is about a critical safety issue concerning folded timber roofs, in various settings, including over school halls.

18 October 2023

CROSS Safety Report

Report ID: 1160

Region: CROSS-UK

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

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

Overloading a portal frame with suspended services

A reporter designing a single storey portal frame used a standard roof service loading of 0.25kN/m2. After the project was completed, a tenant for the unit took over fit out and added a considerable amount of sprinkler pipework into the roof. This created local overloading.

21 August 2023

CROSS Safety Report

Report ID: 1195

Region: CROSS-UK

Collapse of unusual hybrid concrete and steel strand truss on school roof

This report concerns the collapse of a school hall roof which resulted from the failure of one of a number of unusual hybrid concrete and steel strand trusses. The trusses consist of a precast reinforced concrete top chord and verticals with a bottom chord of tensioned steel strands. The failure of the truss resulted in the collapse of the supported flat roof local to the failed truss, and da...

25 May 2023

CROSS Safety Report

Report ID: 1227

Region: CROSS-UK

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

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

Failure of cantilevered stone staircase

During the renovation and change-of-use conversion of a former minor stately home built around 1830, under pedestrian loading, a ‘cantilevered’ stone staircase partially collapsed without warning.

21 February 2023

CROSS Safety Report

Report ID: 1147

Region: CROSS-UK

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