Gerald A. Dalrymple, P.E., Founding Principal

WDP Office: Manassas

Andy Dalrymple is a leader in the forensic structural engineering field. He currently serves as Committee Secretary for the Masonry Standards Joint Committee responsible for the development of TMS 402/ACI 530/ASCE 5 and TMS 602/ACI 530.1/ASCE 6-Building Code Requirements and Specification for Masonry Structures. Additionally, Andy has assumed the role of overseeing WDP’s technical work product to maintain the consistent delivery of accurate, reliable, high quality services.

“I was first exposed to this business in graduate school, conducting research for the Structures Department at Clemson University. My research on masonry anchor bolts ended up in the TMS 402/602 Building Code & Specification for Masonry Structures, which was gratifying. While at the Brick Institute of America, I was exposed to a wide range of specifications, standards, design applications, and testing methods for not only masonry but also components connected to masonry, such as windows and curtainwalls. After decades of participation on technical committees, I still love to see the research on new products or systems and working to improve the way masonry is used through code development. I enjoy applying that experience to the real world.”

Awards / Awards Committees
  • 2010 TMS Service Award (The Masonry Society)
  • Virginia Chapter of the American Council of Engineering Companies
  • Judge for 2012 Engineering Excellence Awards
  • Judge for 2011 Engineering Excellence Awards
  • Judge for 2010 Engineering Excellence Awards
Technical Papers/Publications & Speaking Engagements

Andy has conducted over 50 presentations for industry organizations and conferences and authored more than 25 articles in technical journals and publications. Topics related to masonry include a range from Test Methods and Forensic Case Studies to Best Practices & Quality Assurance.

Past Peer Reviewer
  • Journal of Testing and Evaluation
  • The Masonry Society Journal
  • The 11th North American Masonry Conference

Professional Qualifications

Years with WDP

Andy founded WDP & Associates in 1995, following 10 years of prior professional experience.


  • Master of Science, Civil Engineering, Clemson University, 1985
  • Bachelor of Science, Civil Engineering, Clemson University, 1983

Professional Registration

Professional Engineer: VA, MD, DC, PA, SC, NC, NJ, NY, WV, IN, MO, FL, CT, AL, GA, TN, TX, MS