The Westray Mine Disaster

Today is the 30th anniversary of the Westray Mine disaster in 1992. At 5:18 am on Saturday, May 9, 1992, a great, blue flame flashed out of the mine opening, a cloud of black smoke on its tail [1]. 26 miners lost their lives when a methane and coal dust explosion destroyed the mine. Eleven…

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Canada’s National Day of Mourning

April 28th poster: Fight for the living, Mourn for the dead.

Fight for the Living, Mourn for the Dead On April 28th, Canada’s National Day of Mourning, we mourn for our workplace dead. According to the WSIB, in 2020, there were 245 people who died from a work-related injury or illness in Ontario [1]. Workplace deaths have broad and deep effects on the families of the…

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CSA Z432 Fourth Edition Open for Public Review!

CSA just opened public review on CSA Z432, Safeguarding of Machinery, fourth edition. If you are a user, a builder of machinery, or an evaluator of machinery, this is your opportunity to see the draft of this important standard and to make comments to help the Technical Committee improve the standard on your behalf. Note: The…

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Ontario OHSA turns 43

Headline, the Toronto Telegram, March 18, 1960. "It was a Hell-Hole."

The Ontario Occupational Health and Safety Act (OHSA) turns 43 today. For many workers, this important legislation came into force long before they were born, but some workers will remember the days before this important Act came into force. The Act came into force in 1979, but Ontario had a long history of labour-safety-related workplace…

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Understanding Safety Functions: the start/restart function

Car engine start/stop button

After the safety-related stopping and the reset functions, the start/restart function is the next most common. Without a start/restart function, there is no way to make the machine do what it’s supposed to do. If you’re designing a machine control system, you need to understand this function.

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