Investigations underway after Edmonton window washer thrown over railing on windy day.

EDMONTON—The City of Edmonton says it’s investigating a window-washing company that was working on the capital’s tallest tower last week in windy conditions when a suspended platform smashed into the building and threw a worker over a railing.

The city has confirmed to CTV News that Aurum Window Cleaning is under investigation and points to business licensing bylaws as a reason the review.

Occupational Health and Safety Alberta says it is also looking into Friday’s accident in which a platform was whipped into the side of the 66-storey Stantec Tower, shattering a window and leaving the worker dangling by a safety strap.

Emergency responders rescued the worker, who was not hurt.

Gil McGowan, president of the Alberta Federation of Labour, questions why window-washing was going on at a time when Environment Canada had issued a wind advisory with gusts up to 100 kilometres an hour.