Structural Safety Information and Reports

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Stress fracture on temporary compact stairs

A stress fracture to a temporary access compact stair unit was identified on site by a scaffold manager.

Cantilever bridge parapet falsework failure

A reporter has experienced the failure of cantilever parapet falsework twice, for different reasons, using two different products during bridge construction.

Temporary instability of columns

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

Incorrect lifting system used for precast concrete stair elements

A reporter was asked to inspect a precast concrete stair unit which was exhibiting cracking around the lifting anchor locations after being de-moulded.

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.

Slipform temporary works design

A reporter was performing a CAT III check on a 14 storey slipform design when they discovered that the temporary works design was inadequate.

Tower crane bases

A reporter came across a situation in which one of the anchors into a concrete crane base appeared to be loose.

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.

Trench sheet naming confusion

A reporter involved with temporary works design has been made aware that there are two suppliers providing a trench sheet under the same name.

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.

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Stress fracture on temporary compact stairs

Cantilever bridge parapet falsework failure

Temporary instability of columns

Incorrect lifting system used for precast concrete stair elements

Control of temporary works excavation

Slipform temporary works design

Tower crane bases

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

Trench sheet naming confusion

Tower crane base designs

Submit a report

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