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Green roof - structural loading calculations

Posted by Phil Voice on November 22, 2013 at 12:31pm in Design

It is still much too early to speculate on what exactly caused the roof of a Latvian store to collapse, killing many people. See here: http://www.bbc.co.uk/news/world-europe-25045879

Initial reports are saying that there has been working going on on the roof for some time creating a garden. Cranes have been hauling materials onto the roof.

"There were torrents of water coming down off the roof. We headed into the back of the supermarket, the aisles were covered in produce and concrete and people lying on the floor."

"Mr Tribble said a crane had been loading sand and building materials onto the roof for the past few weeks. He said he believed a lack of drainage following heavy rains had contributed to the fall."

For anyone considering a roof garden in design it's really worth getting a structural engineer to calculate the potential weight: even the water content when the roof eventually becomes saturated by rain

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Tags: engineer, loading, roof, safety, structure
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