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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

Concern about rebending starter bars

This report concerns the bending and rebending of starter bars on site during the construction of a multi storey tower. The reporter considered that such a practice could compromise the structure under extreme load conditions.

24 May 2023

CROSS Safety Report

Report ID: 1164

Region: CROSS-UK

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

RAAC planks in a 1970s shopping centre

An existing large shopping centre built circa 1975 had a number of external storerooms and loading bays with roofs constructed using reinforced autoclaved aerated concrete (RAAC) planks. The planks had deflected to the extent that they needed replacing.

20 February 2023

CROSS Safety Report

Report ID: 1155

Region: CROSS-UK

Frustration about getting a response to a public safety concern

A member of the public reported a partially collapsed retaining structure to bodies they believed could be the responsible authority. Despite continued efforts to get attention to the issue, there was no apparent action to address the concern. This raised the reporter’s concern for public safety.

20 February 2023

CROSS Safety Report

Report ID: 1154

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

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

Concerns over old wall misuse

A reporter is concerned about the stability of a boundary wall after a neighbour carried out works adjacent to it.

13 December 2022

CROSS Safety Report

Report ID: 846

Region: CROSS-UK

Inadequate design for basement works

An inadequate structural design for alterations to a basement led to structural distress within a substantial five-storey townhouse.

21 November 2022

CROSS Safety Report

Report ID: 1132

Region: CROSS-UK

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