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I always eyeballed my tagline angles until a load shifted in a stiff breeze
It was a 40-ton lift in Tacoma last month, and the wind caught the load just enough to show me the drift. My old foreman said, 'The book isn't a suggestion, it's a map,' and he was right. How do you guys calculate for wind on a mobile crane setup?
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allen.ruby2d ago
That foreman had it right. The book gives you the math, but you still have to know your own gear and site. We run a chart for basic wind pressure against sail area, then add a buffer for gusts. It's never just the load weight, it's how much surface it presents. A closed shipping container is one thing, an empty frame is another. Tacoma gets those channel winds, so your buffer better be bigger than the book's minimum.
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rowanj212d ago
OSHA's book minimums exist because your buffer is just a guess.
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the_hayden2d ago
What's your buffer for channel winds, @allen.ruby?
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