HOME

TheInfoList



OR:

CTLGroup is an engineering, architecture, and materials science firm that provides engineering, testing and scientific services 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 (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...
(Skokie, Illinois) and
Doha Doha ( ar, الدوحة, ad-Dawḥa or ''ad-Dōḥa'') is the capital city and main financial hub of Qatar. Located on the Persian Gulf coast in the east of the country, north of Al Wakrah and south of Al Khor, it is home to most of the count ...
, State of
Qatar Qatar (, ; ar, قطر, Qaṭar ; local vernacular pronunciation: ), officially the State of Qatar,) is a country in Western Asia. It occupies the Qatar Peninsula on the northeastern coast of the Arabian Peninsula in the Middle East; it s ...
and consulting offices in
New York City, New York New York, often called New York City or NYC, is the most populous city in the United States. With a 2020 population of 8,804,190 distributed over , New York City is also the most densely populated major city in the Un ...
;
Austin, TX Austin is the capital city of the U.S. state of Texas, as well as the seat and largest city of Travis County, with portions extending into Hays and Williamson counties. Incorporated on December 27, 1839, it is the 11th-most-populous city ...
;
Bradenton, FL Bradenton ( ) is a city in and the county seat of Manatee County, Florida, United States. As of the 2020 census, the city's population is 55,698. History Late 18th and early 19th centuries A settlement established by Maroons or escaped s ...
; and
Washington, DC ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, N ...
. 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 Portland Cement Association is a non-profit organization that promotes the use of cement and concrete Concrete is a composite material composed of fine and coarse construction aggregate, aggregate bonded together with a fluid cement (cement ...
(PCA), which had recently moved to
Chicago (''City in a Garden''); I Will , image_map = , map_caption = Interactive Map of Chicago , coordinates = , coordinates_footnotes = , subdivision_type = Country , subdivision_name ...
. The PCA was formed to develop the use of
portland cement Portland cement is the most common type of cement in general use around the world as a basic ingredient of concrete, mortar, stucco, and non-specialty grout. It was developed from other types of hydraulic lime in England in the early 19th ce ...
in construction, which at the time had become the most common construction material. 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. The firm's projects include involvement in the construction of the
Burj Khalifa The Burj Khalifa (; ar, برج خليفة, , Khalifa Tower), known as the Burj Dubai prior to its inauguration in 2010, is a skyscraper in Dubai, United Arab Emirates. It is known for being the world’s tallest building. With a total height ...
, the World Trade Center collapse investigation and work at the
Stonecutters Bridge Stonecutters Bridge is a high level cable-stayed bridge spanning the Rambler Channel in Hong Kong, connecting Nam Wan Kok, Tsing Yi to Stonecutters Island. The bridge deck was completed on 7 April 2009, and opened to traffic on 20 December ...
.


History


2000s

CTLGroup provides highly specialized creep and shrinkage testing for
supertall building A supertall building is an occupied "supertall" structure higher than and beneath . A form of skyscraper, it falls midway between a common minimum definition of "skyscraper" (a building taller ) and a " megatall" building (taller than ). Dif ...
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 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). In 2003 CTLGroup completed an award-winning concrete restoration on
Frank Lloyd Wright Frank Lloyd Wright (June 8, 1867 – April 9, 1959) was an American architect, designer, writer, and educator. He designed more than 1,000 structures over a creative period of 70 years. Wright played a key role in the architectural movements o ...
's
Unity Temple Unity Temple is a Unitarian Universalist church in Oak Park, Illinois, and the home of the Unity Temple Unitarian Universalist Congregation. It was designed by the American architect Frank Lloyd Wright, and built between 1905 and 1908. Unity Te ...
, a
National Historical Landmark A National Historic Landmark (NHL) is a building, district, object, site, or structure that is officially recognized by the United States government for its outstanding historical significance. Only some 2,500 (~3%) of over 90,000 places listed ...
in
Oak Park, Illinois Oak Park is a village in Cook County, Illinois, adjacent to Chicago. It is the 29th-most populous municipality in Illinois with a population of 54,583 as of the 2020 U.S. Census estimate. Oak Park was first settled in 1835 and later incorporated ...
. The firm continued work on in 2008 to restore the cantilevered south roof slab above the sanctuary of the temple. In 2001 CTLGroup’s Dr. W. Gene Corley oversaw the initial
FEMA The Federal Emergency Management Agency (FEMA) is an agency of the United States Department of Homeland Security (DHS), initially created under President Jimmy Carter by Presidential Reorganization Plan No. 3 of 1978 and implemented by two Exec ...
investigation and subsequent report on the
collapse of the World Trade Center The collapse of the World Trade Center occurred during the terrorist attacks of September 11, 2001, after the Twin Towers were struck by two hijacked commercial airliners. One World Trade Center (WTC 1, or the North Tower) was hit at 8:46&nbs ...
on September 11th. His team found that the severity of the destruction was largely due to a lack of fireproofing in the building. 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. ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan, ...
, including the
Lincoln Memorial The Lincoln Memorial is a U.S. national memorial built to honor the 16th president of the United States, Abraham Lincoln. It is on the western end of the National Mall in Washington, D.C., across from the Washington Monument, and is in th ...
and
Jefferson Memorial The Jefferson Memorial is a presidential memorial built in Washington, D.C. between 1939 and 1943 in honor of Thomas Jefferson, the principal author of the United States Declaration of Independence, a central intellectual force behind the ...
. 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 The Vietnam Veterans Memorial is a U.S. national memorial in Washington, D.C., honoring service members of the U.S. armed forces who served in the Vietnam War. The site is dominated by two black granite walls engraved with the names of those ...
at the request of the
National Park Service The National Park Service (NPS) is an agency of the United States federal government within the U.S. Department of the Interior that manages all national parks, most national monuments, and other natural, historical, and recreational proper ...
. CTLGroup led the industry in
nondestructive testing Nondestructive testing (NDT) is any of a wide group of analysis techniques used in science and technology industry to evaluate the properties of a material, component or system without causing damage. The terms nondestructive examination (NDE), n ...
(NDT) when NDT expert Allen Davis developed and promoted the Impulse Response (IR) technique, a stress wave test used to evaluate concrete conditions. In 1995,
W. Gene Corley Dr. W. Gene Corley, P.E. (December 19, 1935 – March 1, 2013) was an American structural engineer and "preeminent expert on building collapse investigations and building codes." Corley was the Senior Vice President of CTLGroup from 1987 to 2013, ...
, the “preeminent expert on building collapse investigations and building codes” led the investigation of the structural performance of the Alfred P. Murrah Federal Building in Oklahoma City, following the
bombing A bomb is an explosive weapon that uses the exothermic reaction of an explosive material to provide an extremely sudden and violent release of energy. Detonations inflict damage principally through ground- and atmosphere-transmitted mechanic ...
there. He served as the head of the Building Performance Assessment Team (BPAT) which involved the
American Society of Civil Engineers American(s) may refer to: * American, something of, from, or related to the United States of America, commonly known as the "United States" or "America" ** Americans, citizens and nationals of the United States of America ** American ancestry, p ...
, as well as representatives from the
Federal Emergency Management Agency The Federal Emergency Management Agency (FEMA) is an agency of the United States Department of Homeland Security (DHS), initially created under President Jimmy Carter by Presidential Reorganization Plan No. 3 of 1978 and implemented by two Exec ...
(FEMA), the
United States Army Corps of Engineers , colors = , anniversaries = 16 June (Organization Day) , battles = , battles_label = Wars , website = , commander1 = ...
, the
General Services Administration The General Services Administration (GSA) is an independent agency of the United States government established in 1949 to help manage and support the basic functioning of federal agencies. GSA supplies products and communications for U.S. gove ...
, and the
National Institute of Standards and Technology The National Institute of Standards and Technology (NIST) is an agency of the United States Department of Commerce whose mission is to promote American innovation and industrial competitiveness. NIST's activities are organized into physical sc ...
.


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 The National Aeronautics and Space Administration (NASA ) is an independent agency of the US federal government responsible for the civil space program, aeronautics research, and space research. NASA was established in 1958, succeeding ...
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, also referred to as
lunarcrete Lunarcrete, also known as "mooncrete", an idea first proposed by Larry A. Beyer of the University of Pittsburgh in 1985, is a hypothetical construction aggregate, similar to concrete, formed from lunar regolith, that would reduce the construction ...
, 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.


References


External links


CTLGroup.com
{{DEFAULTSORT:Ctlgroup Consulting firms established in 1916 Engineering companies of the United States Companies based in Skokie, Illinois Technology companies established in 1916 1916 establishments in Illinois