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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.

Galvanic (bimetallic) corrosion not considered in cladding design

A cladding designer and installer did not consider galvanic (bimetallic) corrosion which led to remedial works being required.

Tower crane base designs

A reporter’s firm has been involved in the design and checking of numerous tower crane bases and have come across many examples where the supplier of the tower crane has supplied incorrect loadings. These incorrect loadings could have led to crane failures had the errors not been spotted.

Potentially unsafe buckling resistance checks using software

A number of anomalies were detected in the outputs from a proprietary structural steelwork design program.

Poor quality design leads to failure for a small design and build contract

An example of a small design and build contract where poor design and management led to an inadequate structure being built.

Accelerated corrosion of telecoms mast holding down bolts

During an examination of a 20m high telecoms mast, a reporter found that there had been accelerated corrosion of the galvanised holding down bolts.

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Overloading of existing steelwork frame

Inadequate structural investigations and design of alteration works leads to damage to multi-storey flats.

Concern over modelling of concrete frame building for construction stage

Independent check shows inadequate modelling of concrete frame building with transfer slab.

Inadequate design submissions for alterations to an existing building

An upper storey extension was designed without considering the effect on the structure below.

The management of design related risks: structural, civil and fire engineers

Significant, and tragic, failures involving structures continue to occur: fires in apartment blocks in Milan, London and Taiwan, and structural collapses in Florida and Nigeria being recent examples. This paper gives emphasis to the need for engineers to consider risk management at a fundamental level.

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Modelling of structures

Galvanic (bimetallic) corrosion not considered in cladding design

Tower crane base designs

Potentially unsafe buckling resistance checks using software

Poor quality design leads to failure for a small design and build contract

Accelerated corrosion of telecoms mast holding down bolts

Share your knowledge

Overloading of existing steelwork frame

Concern over modelling of concrete frame building for construction stage

Inadequate design submissions for alterations to an existing building

The management of design related risks: structural, civil and fire engineers

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