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A technical report on the deadly collapse of the Canterbury Television building is set to reveal what caused the structure to fail in last February's Christchurch quake.
The collapse killed 106 people, including 65 foreign students, when the magnitude 6.3 earthquake struck on February 22 last year.
A Department of Building and Housing technical report, to be released at 3.30pm tomorrow, follows an investigation by the department's own engineering staff and consultants.
It will be accompanied by a report by an expert panel that peer-reviewed the findings.
The reports follow an inquest last year to formally identify those who died in the collapse.
More than half the 184 people killed in the February quake had been in the CTV building.
Prime Minister John Key last year described the building's collapse as the event that symbolised the disaster.
"It was a place where far too many people have lost their lives,'' he said.
The building, which was constructed in the 1980s and certified in 1986, was home to local television station CTV and the King's Education language school, from which eight staff and 65 students lost their lives.