Forensic Engineers and Consultants

Category Archive: Case Studies

Interpreting Industrial Incident Data – Lesson Learned

This is a case study about an incident I investigated involving a major upset in a distillation column.  This blog builds on the previous blogs about the Distributed Control System, DCS – Data is the Key.

Distillation is a method of separating mixtures of compounds with differing boiling points.  Uncle Bill with his still on the hill separates ethanol, that boils at 173°F, from water that boils at 212°F.  If the mixture is heated to above 173°F, but below 212°F, the ethanol will boil, the vapor will travel up out of the unit and then can be condensed and served over ice with an olive…   Any mixture of two or more chemicals with different boiling points can be separated in this way.  The distillation Read More

Experience the Ride, Ride for Experience

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A lot of people own motorcycle(s). Not a lot of people have experience riding motorcycles. More people have motorcycles stored in their garages, covered with all kinds of things, than ride motorcycles. In a similar neglect, there are those people who take their motorcycle out occasionally but never really put the miles or hours on the bike. This means that most of the people that have registered motorcycles do not get a lot of “seat time”. This issue leads to collisions involving motorcycles that should not have happened for more than one reason. When it comes to collision reconstruction and investigations, “ride to live” takes on a whole different meaning. Read More

Roadway Defect Scavenger Hunt for Collision Evidence

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Not too long back, I was on the scene of a collision case where a roadway defect was blamed for the loss of control that led to a single vehicle collision which resulted in major damages and serious injury.  The collision was several years old, and the roadway had not changed over the time passed.  My assignment was to inspect the roadway in the area of the crash, document it (by photographs and 3D scanning), and identify if there was a roadway issue that potentially led to the loss of control.  What happened next was the result of going to the collision location and looking for more than what was to be expected.  These things can help the case tremendously and make a huge difference in resolution. Read More

The Pavement Tells the Story: Reading Evidence from a Motorcycle Crash

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What can be determined from a motorcycle’s skid mark and the roadway evidence it left behind? The obvious, that the motorcycle crashed; but what more? From a recent case, starting with the pre-impact skid mark, a lot was determined about the driver’s (and passenger’s) input into the crash. A single skid mark started at the beginning of the collision location, a common piece of evidence at a motorcycle crash. Taking that mark and analyzing it, several things were determined. Read More

Heat Exchanger Failures Will Shut Your Process Down

Heat exchangers, as the name implies, are used to bring a process stream to a desired temperature.  They can heat or cool either gases or liquids. They are fairly intricate in their construction, therefore not the cheapest piece of equipment to purchase.  For that reason, facilities don’t keep “spare” exchangers lying around, so when they fail catastrophically, the entire manufacturing process goes down with them… and stays down until they are fixed or replaced. Ow!

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Proper Construction and Maintenance Can Prevent Deadly Chimney Fires

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There are few things as comforting to me during the winter months as a warm fire burning in the fireplace.  And in this case, I am talking the real deal, the kind that warms you multiple times; from cutting, splitting and stacking the firewood until finally lighting a fire in the fireplace.  However, just like your parents taught you, fire can be dangerous.  And having an actual fire in your home fireplace comes with some required maintenance to ensure you can safely control the fire and keep it where it belongs. Read More

Don’t Get Burned With Your Gas Grill!

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If there is one thing Americans can agree upon, it is the enjoyment that comes from an outdoor barbeque.  Whether a summertime cookout or a fall BBQ to watch a football game, we all love the fun and fellowship that comes from sharing a meal that was prepared outdoors on a grill or smoker.  In fact, 64% of Americans own a grill or smoker.  The great majority of these are LP fueled gas grills with comparatively few natural gas fired grills.  These products can be enjoyed safely when designed, installed, and used in a proper manner.  However, given the grill’s use of flammable fuel gas and high temperatures, the potential exists for things to go wrong and result in burn injuries or uncontained fires that spread to the surroundings. Read More

Crane Incident Handbook

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Cranes are powerful lifting devices that we see everyday in construction areas, shipping terminals, and industrial sites. They are so common that we often pass by them with little thought. Cranes, however, can sometimes become involved in incidents that injure people or damage equipment. Read More

Failure to Maintain Tow Hook Latch Results in Bystander Death

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An unfortunate and tragic case that we investigated involved a commercial “rollback” recovery truck that was being used to transport a four-wheel drive diesel pickup.  The diesel pickup was not in running order with its’ engine in the bed of the truck.  Consequently, a commercial towing company was hired by the truck owner to transport the truck.  In the process of loading the truck onto the rollback, the truck came uncoupled from the winch and cable system.  The truck then rolled down the inclined bed of the rollback, running over and killing a bystander. Read More

Waste Gas Treatment Equipment Failure: Design & Installation Defects Cause Fire

The thirty-thousand-foot view of manufacturing is raw material in, alter in an appropriate fashion, finished product out, by-product out.  Since the finished product keeps a business in business, it gets the most attention.  What about by-products or waste streams?  Read More

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