Engineer breaks down, accepts blame
A structural engineer has broken down and admitted responsibility for a design flaw that led to a building panel falling and killing a woman in last February's earthquake.
Dick Cusiel of LSC Consulting today gave evidence at the Canterbury earthquakes royal commission hearing into the building at 43 Lichfield St.
The building, known as the Anderson building, was one of four comprising Ballantynes department store.
Cusiel led LSC Consulting's design of the building.
At 12.51pm on February 22 last year Linda Arnold, 57, was sitting in her car outside the building when she was hit by a falling concrete panel and killed.
Cusiel told the commission the concrete panel, known as a spandrel, was attached to the exterior of the building's upper storey car park, but was not connected properly.
"It is, regrettably, this omission which in my view has contributed, with the significant force of the earthquake, to the spandrel falling away from the structure."
The design was drawn by another LSC staff member, but Cusiel missed the error and signed off on it as part of the building consent application.
Cusiel broke down as he "absolutely" accepted responsibility for the mistake.
"Having sent the consent for the drawings and noted the omission, [Linda Arnold's death] has weighed very heavily on me and will always. I extend my very sincere condolences to the family of the victims for this extreme tragedy."
The spandrels on the building's Lichfield St side were attached by a concrete insert known as a TCM-20, Cusiel said, but should also have had pre-cast steel ties to the floor topping, as on other parts of the building.
"The panels were affixed with weld plates and angle cleats to the columns. However, they are primarily there for the purpose of construction, to put the panels in place while the floor topping was poured.
"They were unlikely to have been sufficient to keep the panels in place in the event of a major earthquake."
Cusiel did not know anyone had died because of the falling concrete panel until he was contacted by the commission in November last year.
In acknowledging his mistake, he said the oversight should have been picked up by Christchurch City Council (CCC) staff assessing the drawings included in the building consent application.
"The council would inspect the drawings, pick up any anomalies and refer them back to the engineer to discuss or change."
He was challenged by council lawyer Duncan Laing that the omission was not so obvious it should have been picked up by council staff.
"If the council had inspected they almost certainly would have said 'There's something amiss'.
"I'm not trying to blame the council. I have accepted full responsibility for this. There's no need to hammer the point really."
Christchurch City Council environmental policy and approvals manager Steve McCarthy and structural engineer Peter Smith of Spencer Holmes will give evidence to the commission this afternoon.
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