For the Botanic Garden Plant Science Center visitor gallery, CTLGroup provided materials recommendations, design detailing, and construction procedures to improve appearance and avoid cracking of floor systems and worked with…
CTLGroup was commissioned to perform a comprehensive investigation to assess the current overall condition and structural integrity of the roof structure, as well as the durability potential of the existing structure to…
CTLGroup performed a comprehensive investigation of the entire stadium and facade to evaluate how previous repairs were holding up. CTLGroup’s objectives included reviewing..
Following a failed bolt installation that resulted in a fractured end plate, CTLGroup was retained to evaluate the structural steel plate and connections during the erection of the new scoreboard at Soldier Field. CTLGroup’s investigation included…
CTLGroup reviewed the results of a structural condition survey at Chicago’s Wrigley Field that focused on the need for repairs to the ramps and structural steel framing. CTLGroup’s assessment included…
Located in downtown Chicago, InterPark retained CTLGroup to provide ongoing facade ordinance inspections for 11 of their high-rise parking structures. The CTLGroup team’s scope of work has involved…
The 1630 Sheridan Corporation asked CTLGroup to provide architecture and engineering services with regards to the replacement of the main roof, balcony roofs, and elevator penthouse roofs of the building. The Corporation requested that CTLGroup assist in…
CTLGroup to assisted Tripartite with the field evaluation of the Hal Tyrell Trailside Museum’s exterior masonry facade, which exhibited distress as a result of differential settlement in addition to incompatible mortar used for previous repointing work…
CTLGroup performed a forensic investigation related to the construction of concrete foundation elements for the new PNB Merdeka 118 supertall building in Kuala Lumpur, Malaysia. CTLGroup assisted the SUJV team on evaluating…
An indoor water park contracted CTLGroup to perform an investigation of the standing seam metal roof system and siding of their buildings. The project team determined the cause deterioration at the metal roof system and water infiltration at facade cladding locations and…
CTLGroup identified the source(s) of moisture that was causing efflorescence to form on the interior, exposed brick masonry finish of the north, east, and west walls of the historic brick facade building of James McHugh Construction Company Headquarters in the Historic Motor Row District of Chicago…
Purdue University retained CTLGroup to identify the source(s) of reported water leakage associated with the replacement of its vertical strip windows in Krannert Hall. During our investigation, our team utilized various tests and techniques including…
To determine source(s) of the moisture infiltration associated with the noted distress of the interior plaster finish on the exterior walls of Chaffee Hall at Purdue University , CTLGroup conducted site visits to investigate ongoing deterioration and…
CTLGroup identified concrete, coating, and sealant deterioration as the main cause(s) of leakage and distress when brought in to evaluate a condominium building due to complaints…
Due to recent concrete tank failures that occurred in the United States, one of which resulted in two fatalities at a wastewater treatment plan, A major petrochemical company sought out CTLGroup to assist in the development of inspection and risk assessment methods for above-ground reinforced concrete storage tanks…
The North Branch Library of Evanston, IL required an evaluation into the weatherproofing of the building as well as the compliance of the existing front entrance of the structure to the requirements of the Illinois Accessibility Code. CTLGroup conducted an evaluation which included…
The assessment of the Evanston, IL North Branch Library showed little to no slope to drain water off the roof and little roof insulation in place during CTLGroup’s evaluation of the existing ballasted coal tar pitch roof membrane…
CTLGroup provided cladding consultant services to evaluate various proposed wall constructions of the Everitt Laboratory at the University of Illinois (U of I). The purpose of our evaluation was to identify areas of potential moisture accumulation within…
Eugene Sawyer Water Purification Plant contained a precast concrete channel slab roof system which CTLGroup performed a condition assessment on. Deterioration observed during the visual review included spalled flanges with…
FirstEnergy retained CTLGroup to perform petrographic analyses of three concrete cores extracted horizontally from walls at the Unit 2 Auxiliary Building at the Perry Nuclear Power Plant in Ohio. The petrographic analysis was performed to…
CTLGroup was provided with four local roofing contractor proposals, each with a description of a different scope of work, from the 222 Main Street Condo Association. The CLTGroup team conducted an investigation of the existing roof membrane in order to determine the best long-term value for the Association…
Tthe City of Evanston, IL retained CTLGroup to inspect the exterior envelope of two parking garages in their downtown area. The CTLGroup team evaluated the condition of the exterior facade for both garages and provided repair recommendations…
The City of Evanston Water Utility is a locally designated landmark. CTLGroup was retained to evaluate the existing masonry cladding of the structure to obtain an understanding of the condition of the exterior masonry walls and…
The existing roof skylight of the Engineering Research Lab Building at the University of Illinois at Chicago was evaluated by CTLGroup for water penetration. The skylight was disassembled and reassembled in order to verify…
CTLGroup was onsite when laminar cracks were first identified in the Shield Building at Davis Besse Nuclear Power Station. The CTLGroup team assisted FirstEnergy in evaluation and monitoring of present cracks…
As part of First Energy’s relicensing commitments to the Nuclear Regulatory Commission, CTLGroup was retained to develop special processes to evaluate the containment vessel at the Davise Besse Power station. These commitments involved…
The 50-year-old Cortez Bridge went under evaluation for remaining service life. This evaluation was required to determine whether the structure would receive repairs and functional upgrades or be replaced. CTLGroup developed a comprehensive plan for…
The 200 East Delaware Condominium is a 35-story concrete framed building located in Chicago, IL. The 200 East Delaware Condominium Association retained CTLGroup to provide a condition assessment of the…
ISOGARD™ CI and ISOGARD™ CI PLUS were developed to meet the continuous insulation requirement of the Energy Code. CTLGroup was retained to provide consulting services for the this new product release for usage in exterior wall construction of commercial buildings…
The DSS 35 reinforced concrete antenna pedestal structure at the Canberra Deep Space Communications Complex in Australia exhibited surface voiding and lack of concrete consolidation in an elevated roof slab. CTLGroup performed an evaluation…
The property owner for a major retail outlet retained CTLGroup to evaluate and develop repair designs for four 10-year old parking structures…
A condition assessment was performed for thousands of precast concrete channel slabs that comprised the roof over a large filtration building. CTLGroup executed the assessment and ultimately determined…
The Lexington Pumping Station Reservoir is a partially buried reinforced concrete structure with a total capacity of approximately 30 million gallons. The Chicago Department of Water Management retained CTLGroup to perform a condition assessment of the…
Thompson Hall at Western Illinois University required a condition assessment of the existing cladding. CTLGroup provided recommendations…
Western Summit Constructors retained CTLGroup to evaluate the cause of cracking in concrete filter basin walls…
Originally constructed in 1913, the water treatment facility in Evanston, Illinois includes six filter tanks, two below-grade filtered water reservoirs, a pipe gallery, and dehumidification equipment room. CTLGroup was retained to…
The seven-year old Granville Condominium parking garage contained large floor deflections, floor slab cracking, and masonry cracking on the upper two levels of the structure. CTLGroup was retained to…
The University of Illinois in Champaign-Urbana Davenport Hall project consisted of replacement of slate roofing tiles on the steep sloped roof and investigation of the replacement tiles during installation. BauerLatoza Studio retained CTLGroup to assist with exterior repairs to the slate roof and…
CTLGroup assisted with technical review of specification requirements for concrete materials and deveoped recommendations for specification revisions to improve constructability…
The evaluation of the Kinzie Parking garage identified areas of minor floor slab concrete delaminations, widespread cracking on the floor slab topsides and undersides, failures of the expansion joint systems, and evidence of water leakage at the expansion joints. CTLGroup performed a condition assessment of the multi-level parking garage structure and developed…
Built in 1929 and was listed on the National Register of Historic Places under the Gold Coast Historic District in 1978, 1242 North Lake Shore Drive underwent a comprehensive facade repair program to address persistent water infiltration issues and other masonry distress observed…
The 25-year-old, seven level post-tensioned concrete parking garage of the Hermitage Condominiums contained identified areas of concrete floor slab topside deterioration. The Hermitage Condominium Association sought CTLGroup to perform…
CTLGroup assisted in evaluating the condition of the condominium and its repairs. Our team performed the repair designs and bid documents, assisted during the bidding process, and performed contract administration and construction observations during repairs as well as…
CTLGroup was retained due to client concern with the continuing efflorescence stains on the precast concrete pavers that appeared to be attributable to poor drainage of the sand setting bed. Our firm was brought on site to evaluate previous repair work…
Due to the observed masonry and concrete distress observed during the required critical examination by City of Chicago Exterior Wall Program, CTLGroup was brought onto develop a comprehensive five-year…
The Residences of Forty-One East Eighth Condominium Association needed an expert witness services related to balcony and concrete deterioration. CTLGroup was brought onto…
The Tertiary Clarifier Facilities at Noman M. Cole Jr. Pollution Control Plant in Lorton, Fairfax County, Virginia are approximately 40 years old and are constructed of reinforced concrete. CTLGroup conducted an evaluation of the tertiary clarifier facilities…
A 66-in. diameter water utility transmission main, comprised primarily of Prestressed Concrete Cylinder Pipe (PCCP), contained distress and multiple failures occurring near directional changes in the pipeline. A Municipal Water Utility retained CTLGRoup to perform an evaluation of this pipeline thrust restraint in the water transmission main…
CTLGroup was retained by HDR to perform a preliminary rigid pavement design for sections of the Southern Gateway Project for the Flour/Balfour Battey team…
