A $3 Item...A $90,000 Loss

A $3 Item...A $90,000 Loss

 By:  Zdenek Trnka, PE, TRNKA Engineers, I-ENG-A Member Seattle

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Let’s see now….hmmmm? That works out to odds of 30,000 to 1. A ratio of 30,000:1 is much better than the average lotto odds but not so great for the insurer. When someone, somewhere, uses an incorrect pipe fitting costing $3 and the use of the incorrect fitting results in $90,000 damages it is surely not a happy day.

In this case the incorrect pipe fitting cost only $3 dollars. As it happens, the correct pipe fitting also would cost only about $3. Both pipe fittings look very similar, either as common ordinary brass or bronze. The reason for use of the incorrect fitting is unknown but not likely related to the cost of the fitting since both cost about the same. Most probably the use of the incorrect fitting was a simple matter of inexperience on the part of the person doing the installation of the sea strainer. What does matter is where and how the fitting was used.

The background to this 30,000 to 1 loss has to do with a $1,000,000 sailing yacht. This very nice yacht has an auxiliary motor for times of non-sail propulsion. This auxiliary motor is cooled by seawater that is drawn into the engine cooling system through a sea strainer. Mounted next to the outer hull of the vessel and below the water line, a failure of the sea strainer that allows water to enter unrestricted could cause the yacht to flood or even sink. In this event a pipe fitting broke away from the sea strainer thus allowing water to enter the vessel. The vessel consequently flooded resulting in $90,000 in damages to pumps, motors and other equipment located in the bilge area of the vessel.


Our assignment at Trnka Engineers Co. was to determine the cause of the fitting failure. The cause of the failure could possibly provide the basis for subrogation of the claim. The evidence, the sea strainer and pipe fitting, was provided to us by the adjuster as seen in Photo P-1. The broken fitting location is indicated by the red arrow.

A quick 10x magnification inspection of the broken pipe fitting gave us cause to suspect that a brass pipe fitting was used in the sea water cooling system where bronze, a more appropriate pipe fitting material, should have been used.

There are many copper based alloys, however, only a few are suitable for extended exposure to salt water. Copper alloys with relatively high zinc content when exposed to salt water will succumb to a phenomenon termed “selective leaching” or otherwise known as “dezincification”. The phenomenon in this case is that the zinc, in constant contact with salt water, goes into solution with the sea water and over time leaches out of the pipe fitting. As one would easily conclude the zinc eventually dissolves out of the pipe fitting leaving only the copper base material along with some trace elements. This remaining material is very brittle and fractures easily as occurred in this situation.

A closer view is seen in the Photos P-2 and P-3. Note the “spongy” appearance of the fractured pipe fitting surface in Photo P-3. The spongy appearance occurs with the migration of the zinc out of the copper base material of the pipe fitting.

Sufficiently certain of our suspicion of the cause and origin of the failure of this pipe fitting we employed the services of a competent laboratory to complete a chemical analysis of the pipe fitting and sea strainer body.

The laboratory findings did indeed confirm the fitting to be brass and dezincification did occur as a result of exposure to sea water. This finding was then reported to the adjuster who now had opportunity to subrogate back to the yacht builder.

A Word About Self Interest and Ethics From An Engineer

A Word About Self Interest and Ethics From An Engineer

 By Elvin Aycock, PE, PLS, ACTAR, I-ENG-A Advisor

Integrity is a strict adherence to a set of core values; it is what a person does when no one is watching. Integrity comes from within and is closely associated with the character of a person. It is being honest with oneself and with others.


Ethics is defined as conformance to the principles of conduct as generally accepted by a specific profession. Ethics provides a framework of rules that govern right and wrong when applied to everyday practice on the job.


It is at this juncture that the nonprofessional misses the opportunity to be exposed to the ethics in the workplace. The professional is taught ethics through continuing education courses and publications offered by professional organizations such as NSPE and ASCE.

In the workplace, the main concepts relating to ethics include fairness, conflict of interest, honesty, and sometimes, morality. The players are owners, employees, supervisors, managers, customers, and suppliers.

How many times have you as a professional engineer had to tell a client that you cannot sign a drawing prepared by someone who was not under your supervision? Most engineers would say many times. How many times have you had a client come to you with a certification form given to them by the county/city with instructions to, “Just have your engineer sign it?” Oftentimes, county/city personnel conveniently forget to tell the client about the vast amount of work that must be completed by the engineer before the document can be signed. The client expects you “to just sign it.” It would be unethical to “just sign it” without verifying the information the form required.

Ethical problems often surface when conflicts arise between the interests of the parties involved. An example is a disgruntled employee walking away from a company and attempting to steal clients from his former employer. The employee may justify this by convincing himself that he deserves the client or has some special rights to the client. This employee is acting unethically.

A person without integrity cannot perform ethically in the workplace. Ethics and integrity are closely related concepts. You cannot have ethics without integrity. Integrity is deciding what is right in a given situation and then doing what is right.

When one’s focus on self-interest is paramount, that person may abandon his or her integrity and code of ethics. However, experience has proven that, in the long run, an individual’s personal interests are best served by doing the right thing despite misguided perceptions.


An individual who believes that unethical behavior is in his or her best interest will ultimately discover that his or her thinking is misguided.


The industry’s client community wants to work with honest and ethical people. As soon as a client discovers a professional’s dishonesty and unethical behavior, the client will begin to look over his or her shoulder whenever this person is involved in a common project. The client community in this industry is small, and word spreads quickly about a person’s character.


Misguided self-interests are driven by greed, impatience, seeking a shortcut, ego, fear, and selfish ambitions. Driven by greed, an individual may steal from the company. If a person will steal pencils, he or she will steal clients. If a person steals clients, he or she will steal from clients.

Many engineers provide expert witness services in their field of expertise. Expert witnesses are the only people that can express an opinion in a court of law. This is a special privilege and is one of many reasons why ethics are important for engineers.

Trust, respect, and credibility are essential elements in the life of a professional engineer. The business world is extremely competitive, and it is looking for people to lead in their professions. These business leaders must be trustworthy, respected, and credible in their business and in their community.

The road to unethical behavior is a slippery slope. Often a small unethical decision leads to a bigger unethical decision, and ultimately, to an even bigger unethical decision. The professional engineer should stay away from even the appearance of dishonesty and unethical behavior because an engineer’s reputation is critical.

The state boards for professional engineers take ethics very seriously and investigate all claims of unethical behavior.

I urge every professional engineer to read the Code of Ethics and take continuing education courses on ethics. Additionally, discuss ethics within your firm, especially with non-licensed individuals. This could be the best investment you will ever make to your profession.

Elvin Aycock, P.E., PLS, ACTAR, I-ENG-A Advisor.  Elvin is a a professional engineer, professional land surveyor, professional hydrologist and ACTAR certified. He can be reached at This email address is being protected from spambots. You need JavaScript enabled to view it.

The Event Data Recorder, "Black Box"

The Event Data Recorder, "Black Box"

By Elvin Aycock, PE, ACTAR, I-ENG-A Advisor

 

Many adjusters, new to automobile accidents claims, are surprised when we tell them that all cars have “Black Boxes.” The “Black Box” is usually stored under the driver seat or in the middle console between the seats. It is also known as an Event Data Recorder (EDR).

Most EDRs are built into a vehicle's airbag control module and record information about the deployment of airbags as well as pre-crash data from the engine control module, such as vehicle speed, throttle position and engine speed. This information is recorded immediately before (usually 5 seconds) and immediately after a vehicle impact. Most Event Data Recorders record the speed in one second increments beginning 5 seconds prior to impact. The report will show you the speed of the vehicle at 5 seconds, 4 seconds, 3 seconds, 2 seconds and at 1 second prior to the collision.

For example, if the report said the vehicle was going 62 mph at 5 seconds prior to impact and the posted speed on the roadway was 45 mph, then the driver was traveling 17 mph over the speed limit.

The report will also show if the brakes were engaged, what the throttle position was and if the seat belts were engaged. This information can be very useful to a claims adjuster as well as to the investigating reconstruction engineer.
Not all car manufacturers make Event Data Recorder data available for download. Your local traffic accident reconstruction engineer can determine if the data can be downloaded from the vehicle involved in an accident.

The Event Data Recorder is a very good reconstruction tool and its use grows each year. However, the data from the EDR report should not be used as a stand-alone measure of speed. A reconstruction of the accident should be performed to support the report.   The use of the EDR tool, along with the reconstruction report prepared by an experience and Certified Forensic Engineer provides great evidence that can be used to assist the Adjuster in claims review.

Elvin Aycock, P.E., PH, ACTAR, PLS, I-ENG-A Advisor

Atlanta Engineering Services, Inc.

Investigating Slip, Trip, and Fall Accidents

Investigating Slip, Trip, and Fall Accidents

Lewis W. Ernest, PE, I-ENG-A Advisor

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As winter approaches there will be a higher frequency of slip/trip and fall incidents, especially in areas of snow and ice accumulation on walking surfaces. We should all be mindful of walking conditions on slick surfaces and exercise extreme caution when we are walking in those areas.

In reality, however, slip/trip and fall incidents occur in many everyday situations. A trip over a rug in a commercial building, a fall on a stairs or irregular walking surface or a slip on a wet surface in the produce department of a grocery store are a few examples of common slip/trip and fall incidents. In many cases a slip/trip and fall incidents are purely an “accident” where no party is totally or partially at fault. In some cases, however, a fall incident can be attributed to an improper or unsafe conditions and there may be “fault” to be associated with the incident. Where potential fault is suspected with a slip/trip and fall incident, it would be prudent to investigate the factors surrounding the incident, especially if there is injury to the victim. I-ENG-A members are trained in the aspects of these type incidents and slip/trip and fall topics are covered at many of our annual conventions.

The study of slip/trip and fall incidents involves many common sense factors as well as scientific disciplines and engineering principles. An engineer can evaluate many factors involved in a fall incident to determine if it was a pure accident or if there were faults that could be attributed to the incident. Some of the common areas where an engineer could be helpful in analyzing a fall incident include

  • Physical Conditions-Determining whether the victim’s health or physical condition was a factor in the incident (i.e. age, disability, ailments, impairments, gait, eyesight, normal human locomotion, unimpeded walking ability, etc.)
  • Walkway Conditions-Evaluating walkway conditions (i.e. sidewalks, floor surfaces, stairs, ramps, etc.) to determine if they were built/maintained properly and in accordance with proper codes and if there were any flaws in the walkway surface that may have contributed to the incident
  • Coefficient of Friction and Walking-Analyzing the cause(s) of a slip incident usually includes the measuring the tractive properties of the combination of the shoe sole material and the walkway. The coefficient of friction is a measure of how easily a surface will slide over another surface. Engineers have several methods to test friction conditions and to determine if an abnormal slip condition caused or contributed to the fall incident, and/or if improper foot ware was a factor.
  • Lubricants and Contaminants-These substances that may come between a shoe sole and the walkway may alter tractive characteristics of the surface. An engineer can determine if this was a factor in a slip and fall incident.
  • Transition between Surfaces-Abrupt changes in the tractive properties of a walkway are the cause of many slip/trip and fall incidents. An engineer can determine if an abnormal transition condition was a cause or factor in a fall incident.
  • Stairways-Stairways are a major source of fall incidents. The Consumer Product and Safety Commission has reported that stairs rank second only to bicycles as the most hazardous consumer product. Engineers are well trained to evaluate whether an improperly built/maintained stairway or handrail system was a factor in a fall incident.
  • Illumination-The illumination levels (especially on stairways), as well as walkway textures, shadows, traffic levels and walkway slopes are other variables that can influence fall incidents. Engineers are well equipped to determine if improper lighting or other factors caused or contributed to a slip/trip and fall incident.

In conclusion, we encourage our readers to be very mindful of unsafe walking conditions during the winter months, as well as during your normal waling activities. And if you are involved in or associated with a fall, feel free to contact one of our local I-ENG-A member firms to help in the investigation into the cause(s) of the incident.

If you would like an evaluation of a slip and fall or other incident resulting in injury or loss, please request a complementary consultation at www.ienga.com/assignment.

PEX Plumbing Failures

PEX Plumbing Failures

 

According to Cadell Calkings, BAE/MAE, Penn State, with the price of copper continuing to rise, there has been a need for more economical plumbing solutions.  Synthetic materials are being used to accomplish this with the most prevalent in recent years being PEX plumbing systems.  PEX is cross-linked Polyethylene.  It has gained popularity in the heating and potable water plumbing because of its ease of use and less fittings.  PEX can bend around corners, whereas copper or PVC would need an elbow fitting.  This makes for easier and quicker installation; however, it is currently involved in recent failures and lawsuits. 

Failures can be linked to two different areas; the pipe and the fitting.  The pipe can fail when it has been exposed to chlorine. It is common to have small levels of chlorine in the water supply. This can cause oxidation.  Another cause of failure is when the PEX has been exposed to sunlight.  Plastic when exposed to ultraviolet light or sunlight causes the molecules to break down making the pipe brittle and subject to rupture. PEX is also permeable to certain chemicals and oxygen causing further problems.  PEX piping also has chemical byproducts that are often left behind in the pipe; some of them have been reported by the United States Environmental Protection Agency to be carcinogens.  Dezincification is another problem that has caused fittings to leak.  Due to these many failures, there is a civil lawsuit as well as class action lawsuits. 

The Investigative Engineers Association (I-ENG-A) Convention 2014, slated for November 9-12, 2014,  may address this and other failure issues.  Look for the preliminary convention agenda coming soon.