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CTLGroup, a team of engineers and scientists, performs investigation, analysis and specialized testing of new and existing structures and materials. Our expertise enables us to develop the most comprehensive and effective solutions for each client’s specific needs.

ANSI Standard 189.1-2009 cover New Standard Released for High-Performance Green Buildings

A new standard for the design of high-performance green buildings was released on January 22, 2010. Published by ASHRAE, the USGBC and IES, Standard 189.1 is the first national code-intended green building standard in the U.S.

Martha VanGeem, head of CTLGroup’s Building Science & Sustainability practice, was a significant contributor to the drafting and development of this revolutionary building standard. More...

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CTLLabOverviewVideo Overview of CTLGroup Laboratory Services


CTLGroup uniquely combines consulting and testing services. Take a moment to tour our laboratories and see highlighted services we provide. Maybe you will find just the service or test you need! More...

BlastsNeed a Structural Investigation?
Our Tools of the Trade offer a one-source comprehensive study!

So, you have a structural problem — you’re concerned about the “who” and the “how” of finding the answers you need to resolve it. CTLGroup has a solid reputation for being a “One-Stop Shop” because of its multidisciplinary makeup. We invite you to visit our Turning 21 website story for an outline of our firm’s unique history. Links to pages for additional information on specific services are provided. To broaden your perspective of the breadth of our capabilities and experience, we offer here a sampling of the many ways we meet the needs of our clients and bring exemplary resolution using our Tools of the Trade. More...

Featured Project Profile

Burj Dubai (now known as Burj Khalifa)

The new tallest building in the world is the Burj Khalifa, a concrete structure in Dubai. CTLGroup provided expert consulting and testing vital to this project’s use of concrete to reach record-breaking heights.

“CTLGroup was a great resource and made a major contribution to the success of Burj Khalifa” – Bill Baker of Skidmore Owings & Merrill LLP More...


CTLGroup's Advanced Engineering and Mechanics

Bridges, buildings, dams, industrial facilities, pipelines, stadiums, tanks, tunnels, utility structures — CTLGroup offers specialized consulting services for all these structures and their components. To learn more about these services . .  More...

 Advanced Engineering & Mechanics


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