It will likely be at least August before federal workers return to work at 441 University Ave. West in Windsor.
Public Services and Procurement Canada met with workers on Tuesday to provide them with an update on the status of the building.
About 300 employees had complained about vibrations and on June 27th, the Canada Revenue Agency workers were relocated to other buildings or are now working from home.
A third engineering firm is currently conducting a scientific analysis of the building and its structure and it will be 4-5 weeks before it is complete.
Officials at PSPC emphasize the two previous engineering firms concluded the building is 'safe to occupy', but the federal government wants to be cautious.
Regional Director of Professional and Technical Services for PSPC Ontario Stephen Boyne says the building will not collapse.
"We have had three different engineering firms examine the building, the structure of the building to varying degrees. All three of the firms have indicated that the building is safe to occupy, there is no danger of a spontaneous collapse of a floor or the roof," he says. "The federal government is exercising an abundance of caution in ensuring that concerns that are raised by federal employees have been appropriately addressed."
Director General Technical Services at PSPC Kelby Hamilton sat in the building Tuesday morning and felt the vibrations.
"It was clearly evident today that there were vibrations noticeable in that work space. When somebody walks outside of the cubical space, there is noticeable deflection, we can say is it vibration or deflection."
Hamilton says the key is to take steps so employees feel the building is safe again.
Director of Regional Communications for the CRA Jelica Zdero says no work has been delayed because of the relocation and all security measures have been taken to ensure the safety of taxpayer information.