Engineer as Expert – 2017

Engineer as Expert - 2017

Definition of an Expert Witness

According to the definition of an expert witness is as follows:

“An expert witness is a witness who has knowledge beyond that of the ordinary lay person enabling him/her to give testimony regarding an issue that requires expertise to understand.” USLEGAL goes on to explain, “Experts are allowed to give opinion testimony which a non-expert witness may be prohibited from testifying to. In court, the party offering the expert must lay a foundation for the expert’s testimony. Laying the foundation involves testifying about the expert’s credentials and experience that qualifies him/her as an expert. Sometimes the opposing party will stipulate (agree to) to the expert’s qualifications in the interests of judicial economy.”

Practitioner Seminar

Mike Drerup, P.E., a consulting building performance engineer delivered a great practitioner lecture on the topic “Engineer as an Expert” to students in the AE 537 Building Failures class in architectural engineering at Penn State.  In addition to covering terminology such as “standard of care”, depositions, chain of custody on evidence, etc., Mr. Drerup discussed the role of the role and limitations of the expert in a number of categories.  He related the discussion to practice and the industry by looking at three main thrusts which included case study examples:

  • Structure
  • Enclosure
  • Materials

The use of the case study examples illustrated the process and to demonstrated the scope of effort and scientific study required for many forensic investigations.

ASCE TCFE Guidelines

In terms of guidelines related to the practice of forensic engineering for buildings and infrastructure, the topic is well covered in the publication Guidelines for Forensic Engineering Practice (Guidelines) by the Forensic Engineering Practice Committee (FEPC), Forensic Engineering Division of the American Society of Civil Engineers (ASCE).

The Guidelines are organized into five general topics of forensic engineering.

  1. Qualifications: addressing commonly accepted education and requirements for forensic engineers.
  2. Investigations: illustrating the typical aspects of physically carrying out a forensic investigation.
  3. Ethics: discussing guidelines for the ethical behaviors of the forensic engineers.
  4. Legal: providing a brief overview of the court system as it applied to the construction industry.
  5. Business: relating the non-technical management side of forensic engineering practices and the marketing of forensic engineering services within an acceptable ethical scheme is encouraged.

An excellent follow up article on this topic authored by Robert T. Ratay was published in Structures magazine and can be downloaded using the links below:

The Forensic Expert Consultant / Witness and the companion article Professional Practice of Forensic Structural Engineering both of which were published in Structure Magazine.

Michael J. Drerup, P.E. Building Performance Consultant
Mr. Drerup is a professional engineer with 20 years of structural engineering and
building technology experience, with an emphasis on the performance, maintenance,
repair, and retrofit of existing buildings and structures. He has planned and directed
field and laboratory studies to evaluate the performance and durability of a variety of
building systems, components, and materials, including structural systems, facades,
and flooring. Mr. Drerup works closely with specialists in other disciplines to assemble
and manage teams tailored for larger and more complex assignments. He has also
investigated numerous damage claims resulting from a variety of natural and man-made
causes, including earthquakes, weather events, explosions, fire, impact, construction
activities, and defective design or construction. He has served as an expert witness in
numerous cases, and he has testified at deposition, trial, and mediation.
Mr. Drerup has served on the American Society of Civil Engineer’s (ASCE’s) Technical
Council on Forensic Engineering for 15 years and recently completed his term as
Council chair. During that time, he has led the development of continuing education
seminars for engineers and architects, chaired ASCE’s Fifth Congress on Forensic
Engineering in Washington, DC, and served on the steering committee for the Sixth
Congress in San Francisco. He has also represented ASCE internationally, including
two sponsored trips to forensic engineering conferences in India, and collaboration
with the Institution of Forensic Engineers in the United Kingdom. He has served as a
reviewer for ASCE’s Journal of Performance of Constructed Facilities for more than
10 years and was guest editor for a special topic issue on non-destructive evaluation of
existing buildings and infrastructure. Mr. Drerup regularly publishes and presents on a
range of topics including technical issues, professional practice, and architectural and
engineering history

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