industry buildings & facilities ; emergent solutions ; energy & resources ; green solutions ; litigation & insurance ; materials & products ; transportation ; water & wastewater founded 1986 headquarters skokie illinois united states number of locations skokie il headquarters ; austin tx ; bradenton fl ; doha state of qatar ; horsham pa ; naperville il ; washington dc area served global key people tim tonyan chief operating officer ; paul haglund chief financial officer services building performance assessment ; building infrastructure & sustainability ; failure investigation ; forensic engineering ; 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 number of employees 115 website ctlgroup.com ctlgroup is an internationally recognized expert consulting engineering and materials science firm that provides engineering testing and scientific services to clients in the following markets building & facilities ; emergent solutions ; 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 austin tx ; bradenton fl ; horsham pa ; naperville il ; and washington dc . services for clients in new york and north carolina are provided through ctl engineers & construction technology consultants p.c. website www.ctlgroup.com . contents 1 background 2 history 2.1 2000s 2.2 1990s 2.3 1980s 3 references 4 external links background edit ctlgroup began in 1916 as the research and development laboratory for the portland cement association pca which was formed to develop the use of portland cement in construction which at the time had become the most common construction material . 1 2 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 . 3 the firm s projects include involvement in the construction of the burj khalifa 4 the world trade center collapse investigation 5 and work at the stonecutters bridge . 6 history edit 2000s edit ctlgroup provides highly specialized creep and shrinkage testing for supertall buildings . 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 7 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 tower chicago ; al hamra tower kuwait ; freedom tower new york ; pentominium dubai ; and the tallest building in the world the 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 energy standard for buildings except low rise residential buildings since 1990 . 8 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 . 9 in 2001 ctlgroup s dr. w. gene corley oversaw the initial fema investigation and subsequent report on the collapse of the world trade center on september 11th . his team found that the severity of the destruction was largely due to a lack of fireproofing in the building . 10 the recommendations on structural fireproofing in corley s report were implemented throughout the industry . 1990s edit 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 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 . 11 in 1995 w. gene corley the preeminent expert on building collapse investigations and building codes 5 led the investigation of the structural performance of the alfred p. murrah federal building in oklahoma city following the bombing there . 12 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 edit 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 13 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 . 14 references edit admin october 31 2009 . grey portland cement the most common in concrete . retrieved august 17 2011 . moore charles march 1 2005 . concrete reasons most common building material a better choice . allbusiness.com . retrieved august 17 2011 . construction technology laboratories changes name . allbusiness.com . may 1 2005 . retrieved august 17 2011 . kamin blair august 2010 . burj khalifa . architectural record . retrieved august 17 2011 . a b testimony of dr. w. gene corley on behalf of the american society of civil engineers ... pdf . american society of civil engineers . march 6 2002 . retrieved august 17 2011 . stonecutters bridge hong kong china retrieved august 17 2011 d ambrosia matthew ; mohler nathaniel early age cracking retrieved august 17 2011 new 189.1 will change how buildings are built . building design construction . march 23 2010 . retrieved august 23 2011 . the shore thing retrieved august 17 2011 american society of civil engineers may 1 2002 testimony of dr. w. gene corley on behalf of the american society of civil engineers ... pdf retrieved august 17 2011 davis allen g. ; petersen claus germann 2003 nondestructive evaluation of prestressed concrete bridges using impulse response retrieved august 17 2011 corley w. gene ; mlakar paul f. ; sozen mete a. ; thornton charles h. august 1998 the oklahoma city bombing summary and recommendations for multihazard mitigation retrieved august 17 2011 lin t.d. ; stark d. 1986 physical properties of concrete made with apollo 16 lunar soil sample pdf retrieved august 17 2011 palley reese 2010 . lunar transit pdf . concrete a seven thousand year history . the quantuck lane press . retrieved august 17 2011 . external links edit ctlgroup.com retrieved from https en.wikipedia.org w index.php title ctlgroup & oldid 741496607 categories companies established in 1916engineering companies of the united statescompanies based in skokie illinoishidden categories all articles with unsourced statementsarticles with unsourced statements from september 2011articles created via the article wizard navigation menu personal tools not logged intalkcontributionscreate accountlog in namespaces article talk variants views read edit view history more search navigation main pagecontentsfeatured contentcurrent eventsrandom articledonate to wikipediawikipedia store interaction helpabout wikipediacommunity portalrecent changescontact page tools what links hererelated changesupload filespecial pagespermanent linkpage informationwikidata itemcite this page print export create a bookdownload as pdfprintable version languages portugu s edit links this page was last modified on 27 september 2016 at 21 34 . text is available under the creative commons attribution sharealike license ; additional terms may apply . by using this site you agree to the terms of use and privacy policy . wikipedia is a registered trademark of the wikimedia foundation inc. a non profit organization . privacy policy about wikipedia disclaimers contact wikipedia developers cookie statement mobile view