Ciro Ramirez


Dr. Ciro Ramirez has over 35 years of engineering experience, including product design, structural and mechanical analysis, and forensic consulting. He is a licensed professional engineer, is a Certified Safety and Health Official, is ACTAR accredited in accident reconstruction, and is a member of a number of professional organizations. Have a question for Ciro? You can reach him at

Defeat the Interlock, Lose a Hand
The human element is often the weakest link in the pursuit of safety — something frequently illustrated by workers bypassing a critical safety device. Common excuses for such modifications include convenience, the desire for better throughput, false switch actuation, and poor switch reliability.
Defeat the Safety Interlock, Lose a Hand 3
Equipment manufacturers may not be able to control the actions of equipment users, but they can reduce the temptation to disable critical interlocks by striving to improve the human factor performance of their products.
Why newbies are dangerous

The workers most likely to get hurt or killed on the job are new employees or those who have been newly reassigned.

Is your design “reasonably safe?” 1
The whole thing took only a couple of seconds. One moment, the farmer was mowing the slope of a hill. The next, his tractor was on its side, leaving him dangling from his seat belt, stunned but not seriously injured. Thanks to the roll bar built into the tractor, his biggest worry was how to explain to his wife that he would need help righting his machine. Fifty years ago, that farmer likely would have been dead.
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