Our Projects

ESi has assisted clients in many different industries with the full range of technical support services - from design review and assessment to failure investigation and analysis. Our multidisciplinary team of engineers and technicians performs a comprehensive assessment and provides pragmatic, effective recommendations for mitigating risks, redesigning procedures, and remediating deficiencies and failures in systems, structures, and/or equipment.

Areas of Expertise

PVC Pipe Failure

PVC Pipe Failure

ESi was retained to investigate the failure of a PVC pipe. The pipe showed indications of rapid crack propagation that would be consistent with a high-pressure event. In order to understand the effect of the pre-existing crack on the remaining strength of the pipe, a fracture mechanics analysis was performed.

XLPE Storage Tank

XLPE Storage Tank

A large cross-linked polyethylene (XLPE or PEX) storage tank for 93% sulphuric acid failed after approximately seven months of service. The release of acid occurred through circumferential cracks that developed on the bottom panel of the tank near the corner radius with the sidewall.

Building Envelop Consulting and Water Intrusion Testing

Building Envelop Consulting and Water Intrusion Testing

ESi was retained to conduct a detailed review the construction drawings and specifications, review the product literature, conduct a constructability review to identify and resolve potential issues prior to installation.

Minivan Collides with Train

Minivan Collides with Train

A minivan was crossing a set of multiple railroad tracks after a train had backed across the crossing on the near track and was subsequently struck by a through train traveling in the opposite direction. ESi was asked to reconstruct the locations and movements of the vehicles leading up to the crash and determine the influence of the backing train on the crash.

Small Aircraft Crashes into House

Small Aircraft Crashes into House

A small aircraft departed for a practice flight in instrument flying conditions. Shortly after takeoff, upon entering the clouds, the aircraft deviated from its clearance, beginning a series of turns, climbs and descents. Ultimately, the aircraft entered a descending right turn and impacted a home.

Ice Accretion on Aircraft

Ice Accretion on Aircraft

This project required our experts to analyze aircraft the ice accretion that would have occurred on a business jet given the meteorological conditions that existed at the time of the aircraft loss of control and accident while on approach to landing.

Aircraft Collision

Aircraft Collision

This project involved the midair between two small single-engine general aviation aircraft that collided after departing a controlled airport. The issue involved determining the flight paths of both aircraft and the visibility from each aircraft to the other.

Safety Analysis of Cable Sleeve

Safety Analysis of Cable Sleeve

ESi was retained by the manufacturer of personal fall protection equipment to perform a safety analysis and documented risk assessment of a newly designed detachable cable sleeve. This product provides fall protection for workers climbing fixed ladders in multiple industrial applications.

Fall from A Rail Station Platform

Fall from A Rail Station Platform

Utilizing the worker’s described scenario as the working hypothesis, data were collected to support or rule out this sequence. ESi’s investigation included a site inspection to evaluate the scene and measure the distances between the platform, ground, and rail.

Fall from a Multi-Story Building

Fall from a Multi-Story Building

Eyewitness testimony was inconsistent regarding the initial location. ESi needed to evaluate the physical evidence of the geometry of the staircase, the railings, and her final location to determine what fall scenarios could be consistent with the laws of physics.

Pre-Impact Motion Analysis

Pre-Impact Motion Analysis

ESi was retained to evaluate the pre-impact motion and positions of a tractor semitrailer and a pickup. The intent of the time-distance-speed analysis was to provide an estimate of the coordinate pre-impact motion of the vehicles based on reasonable assumptions for evaluation of the circumstances.

Explosion at Fertilizer Distribution Facility

Explosion at Fertilizer Distribution Facility

A hopper car loaded with ammonium nitrate was an innocent bystander at West Texas fertilizer distribution facility explosion.

Automotive Accident Reconstruction

Automotive Accident Reconstruction

This project involved a passenger car stopped in the roadway, while a garbage truck allegedly backed into the front of the vehicle. The driver claimed she observed the garbage truck backing up for approximately 30 seconds and that the truck was traveling at approximately 30 mph.

Boeing 737 Crash

Boeing 737 Crash

In 1994, a Boeing 737 was scheduled to fly 127 passengers from Chicago O'Hare International Airport to Pittsburgh International Airport. The aircraft crashed while on approach to Pittsburgh International Airport, killing all aboard.

Obstructive Sleep Apnea-Aviation

Obstructive Sleep Apnea-Aviation

ESi was retained to investigate an aviation crash involving airplane impacting power lines and terrain and pilot and passenger fatally injured.

Generator Fire in Large Power Plant

Generator Fire in Large Power Plant

ESi was retained to perform a cause and origin evaluation on a fire in a large power plant.

HDPE Piping Failure

HDPE Piping Failure

ESi was retained to perform a study on the degradation of HDPE piping resulting from exposure to the disinfectants used in potable water.

Porsche Carrera GT Accident

Porsche Carrera GT Accident

ESi was retained to investigate an accident of a Porsche Carrera GT.

Hazardous Material Dispersion-Tank Car

Hazardous Material Dispersion-Tank Car

ESi was retained to investigate damage to a rail tank car and subsequent release of hazardous materials resulting from a derailment.

Baltimore Tunnel Train Derailment

Baltimore Tunnel Train Derailment

A freight train derailed while passing through the Howard Street tunnel in Baltimore, Maryland.

Failure of a Polypropylene Belt

Failure of a Polypropylene Belt

ESi was retained to determine the cause of failure of a woven polypropylene (PP) belt.

New Orleans Super Dome

New Orleans Super Dome

ESi was called in to assess the structural, mechanical, and electrical elements of the Super Dome after Hurricane Katrina.

Miller Park Crane Collapse

Miller Park Crane Collapse

A large, heavy-lift crane collapsed resulting in three fatalities and extensive damage to the stadium and construction equipment.

UAL Flight 232

UAL Flight 232

United Air Lines Flight 232 crashed and broke apart during the landing attempt.

Hand Fed Chipper Winch Line Accident

Hand Fed Chipper Winch Line Accident

Biomechanical accident reconstruction analysis methodologies were used to address injury modes associated with human operator involvement with a commercial hand fed tree chipper winch line.

Sliding Door Sensor Safety Analysis

Sliding Door Sensor Safety Analysis

A female pedestrian wearing black clothing was injured when an automatic sliding door closed on her while she was standing at the right door threshold. An accident reconstruction was performed to document the injury mechanism.

Estate of Kang vs. Iowa Mold Tooling

Estate of Kang vs. Iowa Mold Tooling

A mechanic in a shop that builds MOW specialty vehicles was lifting an articulating crane to mount it on a truck bed when the sling failed. The mechanic was fatally injured when the load fell to the ground and toppled on top of him.

Insight Driven Solutions

ESi's expertise spans dozens of industries and specializations organized across several practice groups, each staffed by dozens of in-house experts with the technical knowledge, hands-on expertise, and courtroom experience required to execute projects for and with our clients from start to finish.

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