Forensic Engineers and Consultants

Archive: Industrial

Ready, Set, Fly! – Understanding Another Technology for Forensic Investigations

This is the first blog in a series on integrating new technologies into the process of forensic investigations.  Documenting the scene of an incident accurately, efficiently, and safely is a key step in every investigation.  Busy roadways and unstable structures present hazards to the investigator during the investigation process. The use of remote sensors can reduce these risks and provide data that otherwise could not safely be obtained. Read More

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Tom_Kelly_WEB
Fig-1-Chem-E-Intro

Chemical Engineers: More than Glorified Plumbers – Really!

As a senior at Virginia Tech, I was told that ChemE’s were little more than glorified plumbers.  Looking back, I’m pretty sure it was to keep our geek-egos in check. It was an effective tool! However, as I grew and traveled as a professional, it became an effective descriptor; applying to a larger scale and using a modifier or two for specific applications.  So, if you have a loss that falls into one of the categories below, a ChemE could be the expert you need. Read More

nail gun

Should I Trust My Nail Gun?

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Can you imagine framing a house with the tools of our forefathers, using hand saws and hammers, rather than power saws and pneumatic nail guns? Power tools have made the job much easier and faster, that even the amateur is well equipped for this kind of work. Read More

Corrision-Pipes-2

Graphitic Corrosion – Difficult to determine before a failure!

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Graphitic corrosion is a process that may happen in equipment made of iron, particularly grey cast iron, but also ductile cast iron. Graphitic corrosion can lead to unexpected catastrophic failure of the affected part because the cast iron can lose its strength without a visible warning such as a change in size, shape, or appearance. Read More

Steve Hunt using an Excel Tribometer measuring a floor surface.

The Impact of Technology on Slip and Fall Incidents

I have investigated hundreds of slip and fall incidents in my career. Today, we have new tools and technology available to assist investigators in conducting forensic investigations to determine the cause or causes of these incidents and to assist owners and operators in loss preventions efforts to minimize the potential of slip and fall incidents. Read More

Ground rod installed in the earth with clamp.

Grounding versus Bonding – Understanding the Difference in Building Electrical Systems

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While a teenager might be very familiar with being “grounded”, there is confusion over the meaning of the word in the electrical sense. In building electrical systems, “grounding” and “bonding” are two terms that are often misunderstood. Improper application of the concepts of grounding and bonding may create lethal shock and fire hazards. “Earthing” is a term which comes from the European International Electrotechnical Committee (IEC). Earthing is synonymous with grounding but often thought to have a different meaning. Read More

Figure 1:  A view of the blower machinery.

Improper Design Leads to Fatigue Failure In Blower Shaft

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A blower used to exhaust air from an industrial process stopped functioning when the blower wheel drive shaft fractured.  The process, and thereby most of the plant, had to operate at a reduced volume until the blower wheel could be replaced.  The blower wheel had been installed during a shutdown a week before the incident.  The blower wheel was a spare installed when the existing blower wheel was sent for scheduled remanufacturing. Read More

Figure 2: A close view of the opening of the heat sealer. A person’s hand will fit in the opening below the guard to the left. Two "Danger" stickers are visible.

Injury Involving Packaging Machinery

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From time to time, I and other engineers here at Warren are asked to evaluate a case involving an injury that has been caused by machinery designed to produce or fill packaging. The hazards associated with packaging machinery are often similar to other commonly-used industrial machinery, but packaging machinery has its own voluntary consensus standard for machine safety. Read More

stock-picker-forklift

Evolution of Narrow-Aisle Stock Picker Forklifts

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As the cost of warehousing has increased over time, material handling equipment has evolved to allow higher density storage capacities. Narrow aisle and order picker forklifts are among the innovations that have evolved over the past 50 years to accommodate this trend. Read More

Figure 2: A view of some of the undersize anchors used to secure the capstan winch. The anchors at the upper right failed by pulling out of the concrete slab. The one at the lower left failed by bending and pulling out.

Injury Involving a Capstan Winch

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Co-Authored with Jeff Warren, PE   

A capstan winch uses a mechanically powered rotating cylinder, called a capstan, to apply pulling force through a rope. When the rope is looped around the rotating capstan and tightened, friction between the rope and capstan allows the winch to apply force to pull a load. A typical capstan winch is shown in Figure 1 below. Read More

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