FACI, Structural Services Inc. Pat Harrison is a Vice President and Principal with Structural Services, Inc., with 38 years of concrete slab design, construction and forensic experience. Based in Kansas City, he has worked throughout North America, focusing on exposed retail, commercial, and industrial concrete slabs on ground. He has significantly contributed to the design, construction, and development of exposed concrete slabs on ground systems. Recognized for his consultation to a variety of clients, including the largest major retailer’s and e-commerce distributors, his firm has influenced innovative industry design and construction management of concrete slabs. He has also been a featured speaker in various locations in Mexico, Latin and South America, as well as the U.K. on quality floor slab design and construction.