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Concerns over execution class categorisation of steel pedestrian bridge

A reporter is concerned in respect of the steelwork execution class, and quality management arrangements, applied to the construction of a public access pedestrian bridge.

Stunts on bridges cause concern

A thrill-seeker travelling up and over the arch of a bridge, risking serious injury to themselves and others, raises the concerns of a reporter.

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.

Control of temporary works excavation

Poor, high-water content excavated material, slipped into a 15-20m deep borrow pit. The material had slipped to the bottom of the pit partially burying excavation, crushing and screening equipment. If this slip had occurred during working hours, the impact could have been very serious.

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.

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.

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Concerns over execution class categorisation of steel pedestrian bridge

Stunts on bridges cause concern

Connection fixity considerations for steel frame modelling

Control of temporary works excavation

Incorrect modelling of a cantilever

Misleading instructions for a structural component

Share your knowledge

Precast concrete panel fixing

Collapse of brick arch overbridge during demolition

Preparation of holes in concrete for chemical anchors

Potentially unsafe buckling resistance checks using software

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