Forensic Engineers and Consultants

Tag Archive: Chad Jones

  1. Keeping the Home Fires Burning Without the Fires Burning Homes

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    As the Holiday Season approaches in the United States, it is a good time to take a look at several ways that the festivities can go awry.

    For people that have cool or cold weather during winter, the thought of a warm, cozy home can be very comforting.  However, many of the things that come to mind can turn the season on its head very quickly.  Candles are a great example of a decorating trend with potentially serious side effects.  The good folks at the National Fire Protection Association (NFPA) tell us that more than one-third of home decoration fires are started by candles, with more than two of every five decoration fires occurring because decorations were placed too close to a heat source.  One fire I responded to as a firefighter occurred because (more…)

  2. 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…)

  3. 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…)

  4. Taking a Practical Approach to Vehicle Fires

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    “On average, U.S. fire departments responded to a highway vehicle fire every 182 seconds,” according to the NFPA’s Fire Loss Facts Sheet.

    The National Fire Protection Association (NFPA) says that vehicle fires account for about 20 percent of all reported fires. Before I attempt to examine a vehicle fire loss, I like to check various consumer and government agencies websites to see if I can find any recall or historical data that might be important. This is true for heavy truck fires all the way to automobile and motorcycle fires. (more…)

  5. Lack of HVAC System Design and Poor Installation Lead to Extreme Conditions

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    Construction defects can appear in many forms.  The building does not necessarily have to fall down. There are many types of construction defects, including roof leaks, water intrusion into walls, as well as Heating, Ventilation, and Air Conditioning (HVAC) defects.

    One extreme example of this was an office complex I was called to for an investigation of the source of mold observed on the walls.  The occupants complained that they could not find a temperature setting on the thermostat where they could make the office comfortable. When I inspected the office, I couldn’t believe what I was seeing.  A band of black mold (more…)

  6. The Condensate System – An Important Item in Routine HVAC Maintenance

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    HVAC systems are almost everywhere in the United States now.  As a life-long resident of the humid south that grew up in a home without central air conditioning; I definitely appreciate the ability of a well-designed and maintained HVAC system to remove the oppressive summer humidity.

    The very humidity that makes your clothes damp with sweat and hastened the invention of cooled leather seats in automobiles also has another route to create havoc…condensate.

    In order for an HVAC or “air-conditioning system” to reduce the humidity in the air of your home or office it must first cool the air down to a point where the air can no longer keep the moisture in suspension as water vapor.  The moisture must condense… creating condensate.  This is what is happening when your cool beverage of choice “sweats” on the exterior of the container in the humid summer. Now that you have liquid water, as opposed to water vapor, this condensate must be directed out of your conditioned space to prevent water damage due to backed up or leaking condensate. (more…)

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