December 17, 2020 - 12:00pm to 2:00pm

Day 1 - December 10, 2020 12 - 2 pm
Dr. Stephen Pessiki
- Nondestructive evaluation (NDE) of materials and structures plays an important role in the quality assurance of new structures, in the condition assessment of existing structures, and quality assurance of repairs. This two-session webinar will present the theory and practical application of several commonly-used NDE methods for concrete structures, including methods to: assess in-place concrete strength; characterize bar placement parameters (location, cover, size); and detect internal flaws (e.g. voids, cracks, etc.). The webinars will address the underlying principles of each method and its applicability to concrete structures. In doing so, the inherent advantages and limitations of each methods will be described and explained.

Day 2 - December 17, 2020 12-2 pm
Nathaniel Rende
- This portion of the course will include presentation of case studies in which various nondestructive evaluation methods were successfully utilized for concrete assessment during structural evaluation, structural repair, research, and litigation support projects. Common applications for NDE that will be introduced during the selected project examples will include evaluating conformance (and nonconformance) with project specifications for new construction, identifying distress or material degradation in existing structures, collecting as-built details to aid in analysis and repair design, and evaluating completed repairs. This course will also introduce field calibration and correlation processes that are necessary to obtain reliable NDE results and various ways in which NDE data can be effectively presented to clients and owners. 

Learning Objectives:

  • Understand the general theory and applications for nondestructive evaluation (NDE) methods commonly used to evaluate concrete structures.
  • Understand the process of evaluating and selecting appropriate test methods and equipment to meet project objectives for structural evaluation projects, including reinforcement mapping in concrete members, detection of construction-related flaws in concrete, corrosion assessment, assessment of material degradation, and in-place strength assessment.
  • Understand calibration and correlation processes necessary to obtain reliable results when applying NDE methods.
  • Understand effective data presentation and reporting of NDE results.

Note: Day 1 was not recorded.

This is a virtual event on Zoom. 

4 CE Hours will be given


  • Single Day Member - $50
  • Single Day Non-Member - $100
  • Both Days save 20%
    • Member - $80
    • Non-Member - $160

Registration closes at 11:59pm on December 9, 2020 to attend on December 10th or both days.
Registration closes at 11:59pm on December 16, 2020 to attend the December 17th presentation. 

About the Speakers

Stephen Pessiki, Ph.D., FACI, FPCI, Senior Vice President
Thornton Tomasetti, Inc.

Stephen Pessiki is a Professor of Structural Engineering at Lehigh University, and a Senior Vice President in the Forensic Engineering practice at Thornton Tomasetti Inc. His research and teaching interests include the behavior and design of concrete structures, nondestructive evaluation of materials and structures, and fire effects on structures.  Dr. Pessiki joined the Lehigh faculty in 1990, and he served as Chair of the Department of Civil and Environmental Engineering at Lehigh from 2005-2011. He has served on numerous national and  international technical committees, including as Chair of ACI Committee 228 Nondestructive Testing of Concrete. He has been recognized for his teaching and research, and he is a Fellow of the American Concrete Institute and the Precast/Prestressed Concrete Institute.  A dedicated teacher, Dr. Pessiki has taught thousands of students in his 30-year teaching career. 

Nathaniel Rende, Associate Principal
Wiss, Janney, Elstner Associates, Inc.

Mr. Rende is an Associate Principal with WJE and has managed a broad range of forensic engineering assignments, including structural condition assessment, failure investigation, testing and instrumentation, and repair design. He specializes in applying nondestructive evaluation (NDE) methods to the evaluation of concrete, stone and masonry structures. Mr. Rende professional affiliations include the American Concrete Institute (ACI), the Structural Engineers Association of Illinois (SEAOI), and the International Concrete Repair Institute (ICRI) and he has given technical presentations and seminars throughout the nation.



Daniel Runde ( Runde Engineering, Inc. )
Colin Lampark ( HATCH Ltd. )
Seth Hoffman ( Brierley Associates )
Sean McGrath ( EFI Global )
John Grendzinski ( Landmark Structures )
Nancy Radler ( SEAOI )
Stephanie Crain ( SEAOI )
Mary Jane Davis ( SEAOI )
Nathaniel Rende ( Wiss, Janney, Elstner Associates, Inc. (Northbrook) )
Stephen Pessiki ( Thornton Tomasetti )
Ryan Wagner ( American Structurepoint )
Michael Schmidt ( Spancrete )
Fernando Saz ( The Structural Group )
Elaine Shapiro ( Thornton Tomasetti, Inc. )
Steven Jastrzebski ( Sargent & Lundy )
Thanh Do ( Thornton Tomasetti )
Joseph Petrich
Harry Kuchma ( The Structural Group, Ltd. )
Nicholas Tsaggaris ( TS Engineering, LLC )
HAIDER HIMAIRI ( Thornton Tomasetti )
Phillip Quinn ( Thornton Tomasetti )
Timothy Roecker ( Mohr and Kerr Engineering and Land Surveying )
Nezar Abraham ( Thornton Tomasetti )
Matthew McElmury ( TGRWA, LLC )
Daniel Runde ( Runde Engineering, Inc. )