Roof membrane could have prevented roof parking deck collapse, specialist says

The collapse of a section of a roof parking deck at the Algo Centre Mall in Elliot Lake in Ontario, Canada could have been prevented if the structure had a membrane, according to a concrete expert and specialist in structure analysis at McMaster University. The lack of a "well-maintained" membrane left the concrete parking structure exposed to saltwater, which can weaken the material over time, he said.

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