After the mag-7.1 earthquake of September 4, 2010, the building was "badly damaged", with a parapet of the rear wall collapsing.
Tenants vacated "immediately" and engineering consultancy firm Beca yellow-stickered the building after finding "significant cracking and movement."
When the mag-4.9 Boxing Day jolt struck, it suffered more damage and was red-stickered.
On December 27, a "barrier fence" was erected at the front of the building.
Make-safe work was approved by Christchurch City Council on January 6 last year, and building work was carried out under Beca's supervision.
On February 11, building owner Devonia Realty Ltd was advised by Beca that work was completed.
David Wallace of Devonia told the hearing: "As a result of received advice from Beca, the city council removed the barricades" on either February 15 or 16.
Steve McCarthy, Environmental Policy and Approvals Manager of Christchurch City Council, referred to correspondence from Beca which was "critical" to their consideration in lifting the cordon.
A Beca letter to the council said: "Any potential dangerous features have been secured ... and does not pose a threat to the public." Mr McCarthy admitted that there was "a lot of pressure" from neighbouring businesses affected by the cordon, to lift it "with urgency."
"There seemed no reason to leave it up," he said.
But Beca today denied actually recommending the cordon's removal.
Samir Govind, a technical director at Beca, told the commission: "We only provided advice on the completion of the Section 124 notice and that the building was still earthquake prone and it was high risk."
Asked by counsel assisting the commission, Marcus Elliott why he didn't "take a step back" and raise with the city council the "wider risks" associated with the building, Mr Govind replied: "I thought I did."
He added: "The council managed cordons - I didn't manage them."
The Royal Commission of Inquiry into the Canterbury earthquakes has also reviewed the collapse of 246 High St in the city during the February 2011 earthquake which killed Christchurch City Council worker Joe Pohio, 40.
Mr Pohio was having lunch in the neighbouring Link Centre in the pedestrianised High St when the quake hit.
Instead of fleeing, he stopped to assist an elderly woman injured in the first shake when he was killed by falling debris in the collapse of 246 High St - a three-storey unreinforced masonry building - shortly after the magnitude 6.3 earthquake.
The property manager, Christopher Chapman of NAI Harcourts, admitted to the commission that he failed to order an independent inspection of the building after the September and Boxing Day shakes.
Instead, he relied on Christchurch City Council inspections, which ruled it was "safe to occupy.''
The council inspectors did, however, recommend a more detailed Level 2 assessment be carried out with a note to "check rear walls given age''.
However, counsel assisting the commission, Mark Zarifeh said: "There does not appear to have been any level 2 assessment or further council inspection before the February 2011 earthquake.''
Mr Pohio's cousin, former jet-sprinting multiple world champion Rodney Pohio, has said it was heartbreaking but characteristic of his relative to help others before himself.
Rodney said: "The fact he was helping someone else... I understand an old lady got hit in the first shot and he was attending her, as he does. Shortly after he got hit, caught in the back of his head with debris.''
The commission was told that he was trapped by rubble approximately 5m inside the High Street entrance to the Link Centre and then dragged clear by members of the public. CPR was performed but he could not be revived and died at the scene.
