Forensic Engineers and Consultants

Tag Archive: devices

  1. Machine Guarding Resources

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    So, you find yourself with a machine hazard that you need to guard.  Where do your turn for guidance regarding guards?  Several resources are available for the person who is tasked with providing machine guarding.

    The United States government provides resources in the Code of Federal Regulations (CFR).  These can be found at www.ecfr.gov.  Title 29 of the CFR, section 1910 covers “General Industry” regulations.  1910 Subpart O, covers Machinery and Machine Guarding.  Definitions are covered in 1910.211 and it is wise to understand how terms are defined. For instance, in 1910.211(a)(1), Point of operations is defined by the regulation as “that point at which cutting, shaping, boring, or forming is accomplished on the stock.” (more…)

  2. Safety Distance in Machine Safeguarding

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    Hazard can be defined as a potential source of harm.  Machine safeguarding seeks to protect people from these potential sources of harm.  Often distance from a hazard will play a key role in providing a means of protection.

    One would often think of distance as it relates to the location of a barrier guard from a hazard.  ANSI B11.19, Performance Criteria for Safeguarding, defines safety distance as “the distance a safeguard is installed from a hazard such that individuals are not exposed to a hazard.”  An example from ANSI B11.19 of the recommended distance of a slotted opening in a barrier guard from a hazard is shown (more…)

  3. Danger Within Reach

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    How far away from a hazard should you stay?  Your parents or grandparents would probably have told you to stay far away, but what are you to do when a hazard is present, and you must work around or near the hazard?  And what exactly is a hazard?  ISO 12100 Safety of machinery – General principles for design – Risk assessment and risk reduction defines a hazard as a “potential source of harm.”

    Where would a designer of a machine or product start if they wished to protect the user from a known hazard?  Consensus standards are a great place to begin the quest for safety. (more…)

  4. The Concepts of Hazard, Risk, and Harm in Machine Safeguarding

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    Hazard, risk, and harm are terms that are used in the world of machine safeguarding.   How do these words shape the concept of machine safeguarding? Let’s look a little deeper….

    Hazard, which Merriam-Webster defines as a noun, lists its first meaning as a source of danger.

    1: a source of danger

    2a: the effect of unpredictable and unanalyzable forces in determining events : CHANCE, RISK

      b:  a chance event : ACCIDENT  (more…)

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