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Cranes should withstand 140 mph winds. So what happened in Dallas?

(CNN)The crane collapsed with such force, it crushed a Dallas apartment building like it was a cardboard box.One woman, 29-year-old Kiersten Smith, was killed. Others have lost their homes. But the tragic accident during a storm Sunday didn't have to happen, a crane safety expert said. "The reason I say that is there was nobody on the job," said Thomas Barth, a former federal crane accident investigator."It happened on a weekend. Why didn't anybody check the weather for the weekend, knowing that this storm was coming in? Why didn't they prepare the crane?" 'This crane should not have gone over backwards'About three hours before the crane collapsed, the National Weather Service issued a severe thunderstorm watch for the Dallas area. Sunday' ...