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Concerns over corrosion of dissimilar metals in fixing cavity wall tie systems

A reporter is concerned about corrosion that may occur between dissimilar metals that can be used in cavity wall tie systems. The reporter has noted that stainless steel and carbon steel may be fixed together in wall cavities, which are damp environments, and that corrosion of dissimilar metals in contact may occur.

24 May 2023

CROSS Safety Report

Report ID: 1186

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

Change in use results in masonry wall failure

A room with walls of traditional cavity and single skin masonry was lined with plywood and used for storage of wood chips. No thought was given to the lateral pressure on the walls which eventually failed.

6 April 2023

CROSS Safety Report

Report ID: 884

Region: CROSS-UK

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

Further example of incorrect finite element modelling

Concerns in respect of the sufficiency of finite element modelling of masonry walls as part of a reinforced concrete framed building.

20 February 2023

CROSS Safety Report

Report ID: 1145

Region: CROSS-UK

Masonry panels rock in wind due to missing wall ties

Wall ties designed to connect masonry partitions to adjacent steelwork framing were not installed leaving the masonry walls unrestrained. Walls were seen to be rocking in high winds.

17 February 2023

CROSS Safety Report

Report ID: 931

Region: CROSS-UK

Provision for movement in clay brickwork facades

A reporter raises concerns over the detailing and construction of horizontal movement joints in clay brickwork facades.

2 February 2023

CROSS Safety Report

Report ID: 860

Region: CROSS-UK

Excessive surcharge at the back of a retaining wall

A reporter raises concerns about excessive surcharging at the top of a small retaining wall which was supporting the garden of the property.

2 February 2023

CROSS Safety Report

Report ID: 834

Region: CROSS-UK

Collapse of external brick wall during demolition works

A section of an external brick wall of a building collapsed suddenly and unexpectedly part way through a demolition contract.

13 December 2022

CROSS Safety Report

Report ID: 875

Region: CROSS-UK

Boundary retaining wall collapse

A boundary blockwork retaining wall, with a fence on top, part collapses due to inadequate design.

30 August 2022

CROSS Safety Report

Report ID: 1119

Region: CROSS-UK

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