Forensic Engineers and Consultants

Tag Archive: manufacturing

  1. The CE Mark and What Should It Mean to You? Part Two

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    In the previous blog (Part One) we discussed the backstory behind the two stylized letters CE and what it means to the design of machinery bearing the mark.   We outlined some of the requirements of the “Machinery Directive” (MD) which include what are known as “Essential Health and Safety Requirements.” The Essential Health and Safety Requirements incorporate an iterative risk reduction process during design that takes into account (more…)

  2. Machine Guarding and Risk Assessment

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    The Occupational Health and Safety Administration (OSHA) “Top 10 for 2018” violations once again have Machine Safeguarding earning a position on the list. Machine safeguarding was the 9th most cited standard as noted in the list below:

    1. Fall protection, construction (29 CFR 1926.501)
    2. Hazard communication standard, general industry (29 CFR 1910.1200)
    3. Scaffolding, general requirements, construction (29 CFR 1926.451)
    4. Respiratory protection, general industry (29 CFR 1910.134)
    5. Control of hazardous energy (lockout/tagout), general industry (29 CFR 1910.147)
    6. Ladders, construction (29 CFR 1926.1053)]
    7. Powered industrial trucks, general industry (29 CFR 1910.178)
    8. Fall Protection–Training Requirements (29 CFR 1926.503
    9. Machinery and Machine Guarding, general requirements (29 CFR 1910.212)
    10. Eye and Face Protection (29 CFR 1926.102)

    (Source: www.osha.gov/Top_Ten_Standards.html)

    (more…)

  3. Defective Vertical Baler Causes Serious Crush Injury to Operator’s Arm

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    I recently worked on an interesting case involving a box baler. An employee of a butcher shop put some empty cardboard boxes in a vertical box baler and pushed the control switch to compact the boxes. After the 30 by 60 inch platen weighing 851 pounds returned to its raised position, the employee reached into the open space above the bottom door on the baler and began to clear cardboard from the bale tie slots in the bottom of the raised platen. Suddenly, and without warning, the steel pin attaching the platen to the raised hydraulic cylinder rod failed. The heavy steel platen fell and crushed his arm which was outstretched over the baler door into the compaction space.

    (more…)

  4. Fire Investigation Points to Design Failure.

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    Defects that cause problems in machines are categorized into two different concepts. Manufacturing defect is a term that applies to a situation where the defect was unintended. For example, a part was installed that did not meet the designer’s specifications or quality. A design defect is another matter. Design defect is a term that applies to a situation where the defect resulted from a purposeful decision or by failing to investigate or heed available design criteria on the part of a designer or builder. (more…)

  5. Machine Safeguarding for an Imperfect Workforce: Humans.

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    Every day more than 12 people in the United States lose their lives in workplace injuries, according to U.S. Department of Labor data. In 2011, OSHA estimates, 3.3 million people suffered a workplace injury from which they may never fully recover. Two of the top ten most frequently cited OSHA standards that result in injuries and death are lockout/tagout and machine guarding. (more…)

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