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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

Critical welding of structural steelwork missed

The designer of a steelwork roof frame found a critical fabrication error when inspecting steelwork on site before it was erected.

21 November 2022

CROSS Safety Report

Report ID: 1126

Region: CROSS-UK

Connection fixity considerations for steel frame modelling

This report concerns the modelling of joints when using computer programs. In some cases, engineers are applying rotational releases to joints in models but subsequently designing the connections as rigid. This leaves a fundamental mismatch between analysis and design which may lead to unsafe structural connections argues a reporter.

17 November 2022

CROSS Safety Report

Report ID: 1139

Region: CROSS-UK

Incorrect modelling of a cantilever

A steel framed building was incorrectly modelled and designed resulting in excessive deflection of part of the frame even before the frame was loaded with the self-weight of the building.

17 November 2022

CROSS Safety Report

Report ID: 1144

Region: CROSS-UK

Punching shear in concrete slabs at perimeter columns

A reporter raises concerns about the underestimation of bending moments in perimeter columns when assessing punching shear in adjacent concrete slabs. Punching shear failures can be brittle and catastrophic. Designers need to include the appropriate ultimate moment in the design actions.

14 October 2022

CROSS Safety Report

Report ID: 1122

Region: CROSS-AUS

Floor vibration in a gym

Vibration within the floor structure of a second floor gym gives rise to concern of structural resonance and possible fatigue of structural members.

26 August 2022

CROSS Safety Report

Report ID: 1106

Region: CROSS-UK

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Misleading instructions for a structural component

A reporter confirms the difficulty encountered whilst endeavouring to ensure cast-in insulated connectors supporting a parapet wall and balustrade were properly fixed.

26 August 2022

CROSS Safety Report

Report ID: 1127

Region: CROSS-UK

Unsafe design of retrofit cantilever balconies

A structural assessment of a number of new balconies being added to an existing building revealed critical concerns in respect of fixings back into the existing brickwork.

26 August 2022

CROSS Safety Report

Report ID: 1128

Region: CROSS-UK

Concern that the structural design of some recent buildings may not have been checked

A reporter has become increasingly concerned that some buildings may be structurally non-compliant for a number of reasons.

26 August 2022

CROSS Safety Report

Report ID: 1120

Region: CROSS-UK

Modelling of structures

The reporter is concerned that some structural engineers assume without adequate verification that their computer modelling is correct and accurate; that they do not understand the limitations or basis for their modelling; or that the model chosen may not be appropriate for that structure.

2 August 2022

CROSS Safety Report

Report ID: 994

Region: CROSS-AUS