Broken windows mystery solved

LOIS CAIRNS
Last updated 05:00 28/07/2014
Broken glass at Christchurch council
Dean Kozanic/Fairfax NZ

THE BROKEN WINDOWS THEORY: Four plates of glass at Christchurch City Council have broken in the past few weeks for no apparent reason.

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Christchurch Earthquake 2011

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The mystery of the shattering glass at Christchurch's Civic Offices has been solved.

Initial tests have revealed repeated movement of the Hereford St building as a result of the earthquakes is probably to blame for the series of glass plate breakages that have occurred in recent weeks.

At least four plates of glass have shattered on the building's northern facade for no apparent reason.

No-one has been hurt as a result of the breakages.

Ngai Tahu Property, which owns the building said investigations had now been conducted on both the internal and external layers of glazing in the building.

It appeared the problem was isolated to the north facade and the rest of the building remained unaffected.

"There was movement of the building during the quakes, but well within expected tolerances.

The early reports suggest that it is the effects of this movement that have caused the breakages. Tolerances within the frames will now be adjusted as the broken panes are replaced," said Ngai Tahu Property chief executive Tony Sewell.

The replacements would be done in a manner that paid particular attention to the safety of the public, employees and contractors.

Sewell said further research was under way to identify any other potential breakage issues within the external glass on the northern facade.

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