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Being a construction worker is one of the most dangerous jobs and is very physically demanding. According to the Centers for Disease Control and Prevention (CDC), out of the 3.3 million cases of nonfatal injuries and illnesses in 2009, more than 9% was experienced by constructions workers. Construction sites are a risky place to work in; oftentimes workers are required to operate powerful machinery, climb high scaffoldings, or work on roadside construction. Falling debris is also a concern, especially in tall structures where a small object that falls.