Structural Safety Information and Reports

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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.

The use of cast-in ferrules as structural connections

This report highlights several problems that can arise with structural connections between elements when cast-in ferrules (also known as threaded inserts) are used for the anchorage of reinforcing bars.

Temporary movement joint in slabs not installed correctly

Dowels in temporary movement joints for a slab were not installed correctly, impacting the structural behaviour.

Inadequate punching shear reinforcement in flat slabs

This report highlights how remedial works were required in a number of residential buildings after inadequate punching shear reinforcement was identified.

Overloading metal decking in temporary state

During construction of steel structures with composite metal decking floors, a reporter has observed numerous occasions when the metal decking was close to being overloaded.

Insufficient attention to the construction of tower crane bases

While working on construction sites a reporter was involved with tower crane bases supported on piles with pile caps and pedestals with cast-in anchors that had significant construction defects.

GFRP reinforcement in concrete structures

A correspondent has become aware of work being undertaken in the field of glass fibre reinforced polymer (GFRP) reinforcement as a substitute for steel rebar in concrete structures and is deeply concerned by what they have observed.

Checking reinforcement before concrete pours

A reporter shares their concerns about incorrect rebar positioning on site prior to concrete being poured.

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Concern about rebending starter bars

Punching shear design spreadsheets

Temporary instability of columns

The use of cast-in ferrules as structural connections

Temporary movement joint in slabs not installed correctly

Inadequate punching shear reinforcement in flat slabs

Overloading metal decking in temporary state

Insufficient attention to the construction of tower crane bases

GFRP reinforcement in concrete structures

Checking reinforcement before concrete pours

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