Structural Safety Information and Reports

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Modern methods of construction and robustness

This report relates to the design of a low rise modular building and the requirement, or otherwise, for positive fixings between the superstructure and the substructure.

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.

Punching shear design spreadsheets

This is a technical note from a reporter about the methods their firm uses for punching shear design because there was concern about punching shear design spreadsheets possibly leading to potentially unsafe situations. .

Temporary instability of columns

Concerns were raised by a reporter on the temporary stability of concrete columns during construction.

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.

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.

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Modern methods of construction and robustness

Concern about rebending starter bars

Punching shear design spreadsheets

Temporary instability of columns

Connection fixity considerations for steel frame modelling

Punching shear in concrete slabs at perimeter columns

Column stability during erection

Structural corrosion in a swimming pool building causes concern

Steel column erection anchoring connection failure injured worker

Grouting of joints between load-bearing prefabricated concrete members

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