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{{Infobox company
| name = CTLGroup
| logo = [[File:CTLGroup Logo 2010.pdf]]
| type = [[Engineering]], [[Materials Science]], [[Architecture]], [[Consulting Firm]], [[Laboratory]]
| foundation = 1986
| industry = Buildings & Facilities; Emergent Solutions{{buzzword inline|date=June 2019}}; Energy & Resources; Green Solutions{{buzzword inline|date=June 2019}}; Litigation & Insurance; Materials & Products; Transportation; Water & Wastewater
| services = [[Building Performance]] Assessment,
Building Infrastructure & Sustainability,
Failure Investigation,
[[Forensic Engineering]],
[[Mass concrete|Mass Concrete]] Consulting, Materials Consulting
Floor System Evaluation. Metallurgical & Mechanical Consulting, Pavement Consulting, Repair & Rehabilitation, [[Structural Engineering]], Structural Evaluation, Structural Health Monitoring, Chemical Testing, Fatigue Testing, Mechanical Behavior Testing
[[Nondestructive Testing]], [[Petrography]], Physical Testing, Sensors & Structural Monitoring
| location_city = [[Skokie, Illinois]]
| location_country = United States
| locations = Skokie, IL (headquarters); New York, NY; Austin, TX; Bradenton, FL; Doha, State of Qatar; Washington, DC
| area_served = Global
| key_people = • Dennis M. McCann, Ph.D., P.E., President & COO
• Richard Kaczkowski, P.E., S.E., Vice President
• David Mizwicki, CFO
| num_employees = 105
| homepage = [http://www.ctlgroup.com ctlgroup.com]
}}
'''CTLGroup''' is an engineering, architecture, and materials science firm that provides engineering, testing and scientific services in the following markets: Building & Facilities; Emergent Solutions{{buzzword inline|date=June 2019}}; Energy & Resources; Litigation & Insurance; Materials & Products; and Transportation. Its staff includes professionals from the fields of civil, structural, mechanical engineering, architecture, geology, chemistry, ceramics and materials science. Serving clients from around the globe, CTLGroup maintains corporate offices and laboratories in [[Chicago]] (Skokie, Illinois) and [[Doha]], State of [[Qatar]] and consulting offices in [[New York City|New York City, New York]]; [[Austin, TX]]; [[Bradenton, FL]]; and [[Washington, DC]].
Services for clients in New York, Michigan, and North Carolina are provided through CTL Engineers & Construction Technology Consultants.
==Background==
CTLGroup began in 1916 as the research and development laboratory for the [[Portland Cement Association]] (PCA), which had recently moved to [[Chicago]]. The PCA was formed to develop the use of [[portland cement]] in construction, which at the time had become the most common construction material.<ref>{{Cite web |last = Admin |title = Grey Portland Cement: The Most Common in Concrete |date = October 31, 2009 |url=http://www.todaysconcretetechnology.com/grey-portland-cement-the-most-common-in-concrete.html |accessdate = August 17, 2011}}
</ref><ref>{{Cite web |last = Moore |first = Charles |title = Concrete Reasons: Most Common Building Material a Better Choice |date = March 1, 2005 |work = AllBusiness.com |url = http://www.allbusiness.com/north-america/united-states-indiana/380697-1.html |accessdate = August 17, 2011 |archive-url = https://web.archive.org/web/20101001035742/http://www.allbusiness.com/north-america/united-states-indiana/380697-1.html |archive-date = 2010-10-01 |url-status = dead}}</ref>
Demand for consulting grew over the years, eventually expanding into other building materials and engineering issues.
In 1986 CTLGroup became an independent firm, offering engineering, testing, and consulting services. First known as “Construction Technology Laboratories,” the firm changed its name to “CTLGroup” in 2005 to reflect the fact that it provides both laboratory services as well as engineering consulting services.<ref>{{Cite web |last = |title = Construction Technology Laboratories Changes Name |date = May 1, 2005 |work= AllBusiness.com |url=http://www.allbusiness.com/construction/specialty-trade-contractors-foundation/429550-1.html |accessdate = August 17, 2011}}</ref>
The firm's projects include involvement in the construction of the [[Burj Khalifa]],<ref>{{Cite web |last = Kamin |first = Blair |title = Burj Khalifa |publisher = Architectural Record |date = August 2010 |url=http://archrecord.construction.com/projects/portfolio/2010/08/burj_khalifa.asp |accessdate = August 17, 2011}}</ref> the [[collapse of the World Trade Center|World Trade Center collapse]] investigation<ref name="asce.org"/> and work at the [[Stonecutters Bridge]].<ref>{{Citation |title = Stonecutters Bridge Hong Kong, China |url=http://www.roadtraffic-technology.com/projects/stonecutters/ |accessdate = August 17, 2011}}</ref>
[[File:CTL Eastern View.jpg|left|thumb|CTLGroup Headquarters]]
==History==
===2000s===
CTLGroup provides highly specialized creep and shrinkage testing for [[supertall building]]s.
As construction projects rise above 984 feet, which is the minimum for supertall classification, precise calculations for creep and shrinkage become absolutely crucial. As a former research and development lab where the Pickett Effect<ref>{{Citation |last = D'Ambrosia |first = Matthew |last2 = Mohler |first2 = Nathaniel |title = Early-Age Cracking |url=http://www.cement.org/tech/cct_cracking.asp |accessdate = August 17, 2011}}</ref> and other important creep and shrinkage related theories and discoveries were made, CTLGroup was selected to perform much of the testing and consulting for numerous high profile projects, including the following: [[Trump International Hotel and Tower (Chicago)|Trump Tower, Chicago]]; [[Al Hamra Tower|Al Hamra Tower, Kuwait]]; [[One World Trade Center|Freedom Tower, New York]]; [[Pentominium|Pentominium, Dubai]]; and the tallest building in the world, the [[Burj Khalifa|Burj Khalifa, Dubai]].
CTLGroup served as a contributor to the ''ASHRAE/USGBC/IES Standard 189.1 Standard for the Design of High Performance Green Buildings'' (since 2006) and ''[[ASHRAE 90.1|ASHRAE 90.1 Energy Standard for Buildings Except Low-Rise Residential Buildings]]'' (since 1990).<ref>{{Cite web |title = New 189.1 Will Change How Buildings are Built |publisher = Building Design + Construction |date = March 23, 2010 |url=http://www.bdcnetwork.com/qa/new-1891-will-change-how-buildings-are-built |accessdate = August 23, 2011}}</ref>
In 2003 CTLGroup completed an award-winning concrete restoration on [[Frank Lloyd Wright]]'s [[Unity Temple]], a [[National Historical Landmark]] in [[Oak Park, Illinois]]. The firm continued work on in 2008 to restore the cantilevered south roof slab above the sanctuary of the temple.<ref>{{Citation |title = The Shore Thing |url=http://utrf.typepad.com/utrf_blog/2009/11/the-shore-thing.html |accessdate = August 17, 2011}}</ref>
In 2001 CTLGroup’s [[W. Gene Corley|Dr. W. Gene Corley]] oversaw the initial [[Federal Emergency Management Agency|FEMA]] investigation and subsequent report on the [[collapse of the World Trade Center]] on [[September 11 attacks|September 11th]]. His team found that the severity of the destruction was largely due to a lack of fireproofing in the building.<ref>{{Citation |last = American Society of Civil Engineers |title = Testimony of Dr. W. Gene Corley on behalf of the American Society of Civil Engineers… |date = May 1, 2002 |url = http://www.asce.org/uploadedFiles/Communications/5-1-02wtc_testimony.pdf |accessdate = August 17, 2011 |archive-url = https://web.archive.org/web/20110725020837/http://www.asce.org/uploadedFiles/Communications/5-1-02wtc_testimony.pdf |archive-date = July 25, 2011 |url-status = dead}}</ref> The recommendations on structural fireproofing in Corley’s report were implemented throughout the industry.
===1990s===
CTLGroup evaluated deterioration and repair recommendations in monument structures in [[Washington, D.C.]], including the [[Lincoln Memorial]] and [[Jefferson Memorial]]. The firm also measured panel movements and temperature changes to determine the cause of cracks in the vertical granite panels of the [[Vietnam Veterans Memorial]] at the request of the [[National Park Service]].{{citation needed |date= September 2011}}
CTLGroup led the industry in [[nondestructive testing]] (NDT) when NDT expert Allen Davis developed and promoted the Impulse Response (IR) technique, a stress wave test used to evaluate concrete conditions.<ref>{{Citation |last = Davis |first = Allen G. |last2 = Petersen |first2 = Claus Germann |title = Nondestructive Evaluation of Prestressed Concrete Bridges using Impulse Response |year = 2003 |url=http://www.ndt.net/article/ndtce03/papers/v013/v013.htm |accessdate = August 17, 2011}}</ref>
In 1995, [[W. Gene Corley]], the “preeminent expert on building collapse investigations and building codes”<ref name="asce.org">{{Cite web |publisher=[[American Society of Civil Engineers]] |title=Testimony of Dr. W. Gene Corley on behalf of the American Society of Civil Engineers… |date=March 6, 2002 |url=http://www.asce.org/uploadedFiles/Communications/3-6-02wtc_testimony.pdf |accessdate=August 17, 2011 |url-status=dead |archiveurl=https://web.archive.org/web/20110610192735/http://www.asce.org/uploadedFiles/Communications/3-6-02wtc_testimony.pdf |archivedate=June 10, 2011}}</ref> led the investigation of the structural performance of the Alfred P. Murrah Federal Building in Oklahoma City, following the [[Oklahoma City bombing|bombing]] there.<ref>{{Citation |last = Corley |first = W. Gene |last2 = Mlakar |first2 = Paul F. |last3 = Sozen |first3 = Mete A. |last4 = Thornton |first4 = Charles H. |title = The Oklahoma City Bombing: Summary and Recommendations for Multihazard Mitigation |date = August 1998 |url=http://cedb.asce.org/cgi/WWWdisplay.cgi?112819 |accessdate = August 17, 2011}}</ref> He served as the head of the Building Performance Assessment Team (BPAT) which involved the [[American Society of Civil Engineers]], as well as representatives from the [[Federal Emergency Management Agency]] (FEMA), the [[United States Army Corps of Engineers]], the [[General Services Administration]], and the [[National Institute of Standards and Technology]].
===1980s===
When CTLGroup first became an independent subsidiary of PCA in 1986, it expanded its scope of services beyond concrete and modified its structures laboratory to incorporate the testing of steel structures.
In 1986 [[NASA]] granted CTLGroup 40 grams of lunar soil, the largest amount ever awarded to industrial sectors. CTLGroup's experts, having studied the physical properties of concrete made with lunar soil,<ref>{{Citation |last = Lin |first = T.D. |last2 = Stark |first2 = D. |title = Physical Properties of Concrete Made with Apollo 16 Lunar Soil Sample |year = 1986 |url = http://www.nss.org/settlement/moon/library/LB2-515-ConcreteMadeFromApollo16sample.pdf |accessdate = August 17, 2011 |archive-date = June 12, 2011 |archive-url = https://web.archive.org/web/20110612005332/http://www.nss.org/settlement/moon/library/LB2-515-ConcreteMadeFromApollo16sample.pdf |url-status = dead }}</ref> also referred to as [[lunarcrete]], had conceived of building space stations and other structures on the moon using lunar soil. In their research the lunar material was conceived as a cementitious substitute that would help minimize supplies to be brought to the moon for a given construction project. The biggest obstacle to developing it on the moon, however, is that there is little usable hydrogen on the moon, and therefore no water with which to make concrete.<ref>{{Cite web |last = Palley |first = Reese |title = Lunar Transit |work = Concrete: A Seven-Thousand-Year History |publisher = The Quantuck Lane Press |year = 2010 |url = http://assets.ctlgroup.com/865dcea4-9a90-4185-85db-470f851e990c.pdf |accessdate = August 17, 2011 |archive-url = https://web.archive.org/web/20110708212552/http://assets.ctlgroup.com/865dcea4-9a90-4185-85db-470f851e990c.pdf |archive-date = July 8, 2011 |url-status = dead}}</ref>
== References ==
<!--- See http://en.wikipedia.org/wiki/Wikipedia:Footnotes on how to create references using <ref></ref> tags which will then appear here automatically -->
{{Reflist}}
== External links ==
* [http://www.CTLGroup.com/ CTLGroup.com]
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[[Category:Consulting firms established in 1916]]
[[Category:Engineering companies of the United States]]
[[Category:Companies based in Skokie, Illinois]]
[[Category:Technology companies established in 1916]]
[[Category:1916 establishments in Illinois]]