Buildings & Facilities www.CTLGroup.com
CTLGroup’s Buildings & Facilities Practice Group helps clients with complex PRACTICE | at-a-glance structural and materials issues affecting: University & education buildings services highlights Healthcare & laboratory buildings xxStructural systems Municipal buildings xxFaçades Historic buildings & landmarks xxRoofs High-rise commercial & residential buildings xxFlooring Parking garages & structures xxFinishes Stadiums xxFoundations & shoring Cultural & religious facilities xxStructural design evaluation & peer Manufacturing & industrial plants review Special non-building structures xxSmart buildings & structural health monitoring The needs of our Buildings & Facilities clients vary considerably. However, xxNondestructive testing CTLGroup expertise consistently brings value to each project, providing xxFailure & service deficiency innovative and cost effective solutions. Our primary areas of practice include: investigations Building envelope studies, maintenance, rehabilitation & repair programs xxGreen building Design & installation of structural monitoring systems Failure & forensic investigations key facts Nondestructive field testing of structural assemblies & components xx25% of our staff hold Ph.D. degrees Strength & service evaluation of existing building structures xx35% of our staff are PE’s Development of practical solutions to address structural deficiencies xxPE licensed in all 50 states and Canada Troubleshooting construction problems & techniques leading to xxStaff includes LEED accredited improvements in safety and efficiency professionals Geological & geotechnical considerations xxStaff includes Licensed Air Barrier Concrete moisture investigations Field Auditors Flooring consulting & testing Green building, infrastructure, pavement & materials practices
REPRESENTATIVE ENGAGEMENTS National Institute of Health Parking Structure performed field evaluation, laboratory testing, engineering analysis and cost estimating activities for parking structure comprised of cast-in-place reinforced concrete Western Illinois University Thompson Hall condition assessment of existing façade and design of exterior cladding replacement New York City High Risk Construction Oversight reviewed high risk construction operations, including high-rise concrete construction, excavations & hoisting operations Safeco Field real-time structural monitoring of retractable roof system ASHRAE Standard 189.1 and the IgCC key participation in development of next generation green building code Burj Khalifa advanced materials performance evaluation for supertall structures Federal Courthouse Retrofit complete analysis, design & construction CONTACTS oversight of major structural retrofit Frank Laux, S.E., R.A. Frank Lloyd Wright Unity Temple award-winning historic renovation 847.972.3088 Deep Space Antenna Pedestal condition assessment of concrete deteriorated [email protected] by alkali-silica reactions Puerto Rico Aqueduct & Sewer Authority confined space inspection and Steven Smith, Ph.D., S.E., P.E. repair procedure development for cracking & deterioration 410.997.0400 [email protected] BUILDING KNOWLEDGE. DELIVERING RESULTS. Building Envelope www.CTLGroup.com Evaluation
SERVICE | at-a-glance Thermal Properties of Building Materials & Components CTLGroup assists in improving the thermal performance of buildings by:
Identifying areas of missing/poorly performing thermal insulation using infrared thermography Determining thermal mass effects of concrete and masonry Providing repair options when feasible and replacement options when necessary Providing pre-construction project document reviews Water Leakage & Other Moisture Problems CTLGroup conducts investigations into water leakage and other moisture related problems using a combination of the following methods:
Field water penetration testing including spray rack nozzle and chamber testing Analysis of building wall components for condensation potential using WUFI Blower door field testing to identify gaps in air barriers Laboratory testing to determine water vapor transmission of materials Field observation and documentation, and project document review Energy Codes Assistance with using state, IECC and ASHRAE energy codes Specifying insulation levels Green Buildings Environmental life cycle inventory (LCI) and assessment (LCA) analyses ASTM C1549 - Standard Test Method for Determining Solar Reflectance (Albedo) Near Ambient Temperature Using a Portable Solar Reflectometer Comparative analysis of products’ or services’ characteristics to LEED point requirements and prerequisites
Once problems have been identified, CTLGroup can assist clients in implementing repairs by designing and specifying cost effective, durable repairs for the identified problems. We also assist in contract negotiation CORPORATE OFFICE and construction observation to assure our clients that the repairs are 5400 Old Orchard Road implemented as specified. Skokie, IL 60077 800.522.2285
AUSTIN OFFICE 3737 Executive Center Drive Suite 255 Austin, TX 78731 512.219.4075
WASHINGTON DC OFFICE 10400 Little Patuxent Parkway Suite 300 Columbia, MD 21044 410.997.0400 31SS002 Structural Evaluation www.CTLGroup.com & Rehabilitation
SERVICE | at-a-glance Clients call on us to evaluate the cause and extent of structural or architectural problems associated with design, construction methods and materials performance. CTLGroup also conducts investigations of catastrophic events such as structural failure and collapse. CTLGroup’s structural evaluation teams are composed of licensed professional engineers, working closely with our materials scientists and chemists, whose analytical and physical testing augments the engineering findings, opinions and recommendations. CTLGroup’s services include condition assessments, structural integrity evaluation, failure analysis, structural retrofits and strengthening, investigation of material durability issues, new construction problem troubleshooting and preservation of historic structures. CTLGroup offers a complete package of rehabilitation services including design drawings and specifications, cost estimating, construction administration and observations and design-build.
CTLGroup offers a full range of structural and architectural evaluation services for: Buildings Facades and roofs Parking garages Bridges Industrial facilities Utility structures Water and wastewater facilities Dams and mass concrete structures Tunnels and pipelines Sports arenas and stadiums Pavements and civil structures Foundations and subsurface construction
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285
AUSTIN OFFICE 3737 Executive Center Drive Suite 255 Austin, TX 78731 512.219.4075
WASHINGTON DC OFFICE 10400 Little Patuxent Parkway Suite 300 Columbia, MD 21044 410.997.0400 26SS001 Concrete Evaluation & www.CTLGroup.com Repair
SERVICE | at-a-glance CTLGroup can tackle any concrete issue, no matter how intricate or unique. We work with clients to develop and customize approaches in order to translate specific problems into practical solutions. Throughout our 100-year history, CTLGroup has been at the CTLGroup has considerable expertise and experience in the investigation, evaluation, analysis and repair design of concrete structures. Our projects forefront of the most prominent have ranged from the analysis of marquis monuments, to high-rise structures innovations in concrete testing and historic landmark buildings. CTLGroup’s work extends to the evaluation and consulting. Our engineers and and rehabilitation of all types of aging infrastructure. scientists have been responsible for From our vast exposure to concrete deterioration and previously unsuccessful landmark developments, producing repairs, CTLGroup experts are able to customize evaluation and repair countless materials standards, programs to provide the most responsive, cost-effective solutions. With a wide range of performance deficiencies and client needs, each of our repair testing methods, field evaluation projects is unique. procedures, and repair and CTLGroup has in-depth knowledge of current and historic construction restoration design techniques for materials for historic restoration projects. We can investigate how the concrete structures. structure was originally designed and built, review repairs made over the life of the structure, analyze/design replacements to simulate obsolete CTLGroup’s laboratories are construction materials, and develop repairs to restore the structure. internationally recognized and respected as the most Services comprehensive testing and research CTLGroup offers the most sophisticated suite of engineering, testing and facilities in cement technology and consulting services to address concrete performance, durability and life-cycle serviceability with the most progressive repair and restoration techniques reinforced concrete. available in the construction industry today. Concrete/Structural Evaluation
Nondestructive testing Condition assessments Structural integrity evaluation Facade inspections Forensic investigations Failure analysis Corrosion assessment, testing & protection planning Materials & building systems certification & code compliance Structural performance evaluation Investigation of material durability issues Repair/Rehabilitation/Restoration Design
2002 International Concrete Repair Structural strengthening repairs Institute Award of Excellence for Frank Enhance long-term durability repairs Lloyd Wright Unity Temple Restoration Investigation of the makeup of historic materials & specifications of remedial repair materials & techniques Material & repair mock-ups Construction administration & observations CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Roofing Evaluation www.CTLGroup.com
SERVICE | at-a-glance Our building experts focus on the elimination of moisture intrusion, enhancing energy efficiency and maximizing service life of existing roof structures and elements. Our roofing portfolio has developed from our specialized consulting services in the investigation and evaluation of performance problems in buildings over the construction and maintenance life cycle. Roofing materials and systems are an integral component of the enclosure and the building as a whole. Conducting an accurate evaluation of the existing conditions is the first step to improving a roofing system. Once the condition of the existing building components have accurately assessed, including projected remaining useful life, CTLGroup assists clients in implementing cost-effective roof repairs by designing and specifying durable solutions designed to meet the client’s needs and budget. CTLGroup’s building envelope specialists are comprised of engineers, architects and materials scientists qualified in identifying and correcting all types of building envelope (roofs, windows, walls, doors) issues. Our staff are licensed and certified by the Building Enclosure Council, the Air Barrier Association of America and the U.S. Green Building Council. CTLGroup suite of roofing consulting services:
Condition assessment and materials Services testing of the historic Chicago Avenue Field inspection & observation to verify existing as-built conditions Water Tower and Pumping Station Field water penetration testing to identify & verify suspected sources of roofing structure, resulting in a roof water leakage replacement to maximize service life. Roof core analysis & testing to verify as-built conditions & components Infrared thermography to detect moisture infiltration Blower door field testing to identifying gaps in air barriers Laboratory testing to detect water vapor transmission of materials Storm damage assessment Preparation of detailed plans & specifications for repair design Assistance with contractor selection, bid review & negotiations CORPORATE OFFICE Construction observation and field testing during installation/repair 5400 Old Orchard Road Structural Health Monitoring for roof performance and integrity Skokie, IL 60077 800.522.2285
AUSTIN OFFICE 3737 Executive Center Drive Suite 255 Austin, TX 78731 512.219.4075
WASHINGTON DC OFFICE 10400 Little Patuxent Parkway Suite 300 Columbia, MD 21044 410.997.0400 Roofing Evaluation
REPRESENTATIVE ENGAGEMENTS CenturyLink Roof Truss, Seattle, WA design and installation of custom-built load cells for roof truss tendon anchorages to verify post-tensioning forces of the sports complex Chicago Avenue Water Tower and Pumping Station, Chicago, IL condition assessment and structural integrity of the historic roof structure, resulting in roof replacement to maximize service life Cincinnati Museum Center, Cincinnati, Ohio evaluation and repair recommendations for the plaza fountain waterproofing system Cook County Juvenile Detention Center, Chicago, IL roof evaluation Dyett Middle School, Chicago, IL evaluation and repair recommendations for indoor swimming pool steel roof deck system Great Lakes Naval Station, Great Lakes, IL roof evaluation of training facilities Illinois Capital Development Board, Stateville Correctional Center, Crest Hill, IL roof evaluation Jardine East Filter Building Roof Replacement, Chicago, IL visual survey of Sensors and structural integrity the roof underside to document the most critically deteriorated areas that monitoring of CenturyLink Field Roof represented safety hazards and potential building performance issues Truss Kraft Foods Headquarters, Northfield, IL investigation of leakage into office spaces below the plaza, repair design, and construction observation services Kennedy Space Center Launch Control Building, Cape Canaveral, FL structural evaluation of the roof to assess overall condition and determine causes of deterioration; develop remedation recommendations both short and long term Little General Store, Bradshaw, WV cause analysis of roof collapse Metropolitan Water Reclamation District Lab Building, Chicago, IL roof assessment as part of inspection, water penetration testing, and repair design for water leakage and air exfiltration of the existing facade Nassau County Jailhouse, Mineola, NY roofing condition assessment and repair design Richard J. Daley Library, University of Illinois at Chicago, IL roof condition assessment and design repair - Roof Consultants Institute, Outstanding Construction Award Safeco Field Retractable Roof, Seattle, WA performance monitoring Saint John Chrysostom Great Orthodox Monastery, Pleasant Prairie, WI roof evaluation of existing monastery building St. John’s Military Academy, Delafield, WI condition assessment and design repair of masonry and roofing of Victory Memorial Chapel Strawberry Square, Harrisburg, PA roof evaluation of this distinctive retail complex Temple Sholom, Chicago, IL masonry and roofing investigation and roof replacement University of Illinois at Chicago, Campus Buildings IL condition assessment, repair design associated with masonry, facade, roofing, concrete and waterproofing repairs at Chicago Circle Center; Behavioral Sciences Building; Roosevelt Road Building; Education, Communication and Social Works Building; College of Medicine, East Tower; School of Public Health; and University of Illinois Medical Center
BUILDING KNOWLEDGE. DELIVERING RESULTS. 05SS005 Higher Education
www.CTLGroup.com
EDUCATION | at-a-glance CTLGroup is an internationally recognized consulting and materials testing firm providing engineering and scientific services in the buildings and facilities; green solutions; materials and products; energy and resources; and transportation markets. CTLGroup’s staff includes experts in the engineering, architecture, geology, chemistry, ceramics and materials science fields. CTLGroup provides solutions to the complex challenges that higher education buildings and facilities currently face. Whether it’s condition assessment, rehabilitation, renovation or new construction, institutions value our ability to provide a multi-disciplinary approach to solve their problems. - Our engineering expertise is complemented by one of the largest and Northwestern University Ryan Field Structural condition assessment. most comprehensive private testing laboratories in the world, allowing us to address problems from a structural, architectural, and materials perspective. As a result, CTLGroup delivers integrated solutions in every service highlights phase of the design, construction and maintenance life-cycle. CTLGroup has worked with over 160 universities and colleges across the U.S., Consulting Services providing a broad spectrum of profes- Structural Evaluation/Investigation sional consulting and technical services Structural Engineering including, but not limited to: Building Science & Sustainability • Structural and architectural concrete Nondestructive Testing/Nondestructive Evaluation evaluation and repair Preconstruction Services • Flooring distress mitigation Structural Health Monitoring • Parking structure condition assessment Materials Consulting and repair Metallurgical/Mechanical Consulting • Building envelope evaluation and repair Litigation Services • Roofing assessment and remediation Testing Services • Steam/utility tunnel condition assessment and repair Materials Testing (Chemical, Mortar, Petrography, Physical) • Athletic stadium structural evaluation Structural Engineering (Static, Dynamic, Specialized Testing/Sensors) and repair REPRESENTATIVE ENGAGEMENTS • Campus pavement specialized DePaul University, Chicago, IL testing and consulting for floor moisture issues consulting Duke University, Durham, NC petrographic examination of parking garage • Inspection and evaluation of freeze- Harvard University, Cambridge, MA garage fire damage investigation thaw and fire damage Iowa State University, Ames, IA structural evaluation of and rehabilitation of • Construction vibration assessment and precast concrete facades at four residential halls monitoring Loyola University, Chicago, IL nondestructive testing at campus chapel Michigan State University, East Lansing, MI structural rehabilitation services in connection with capital improvement program at Spartan Stadium Northwestern University, Evanston, IL structural evaluation, condition assessment, repair recommendations, and maintenance plan at Ryan Field CONTACTS Western Illinois University Macomb, IL Thompson Hall facade repairs Martin Maingot, PE, SE University of Chicago, Chicago, IL evaluation of floor distress 847.972.3346 University of Illinois at Chicago, Chicago, IL condition assessment and repair [email protected] design services for masonry, facade, roofing, concrete, and waterproofing repairs at several campus locations BUILDING KNOWLEDGE. DELIVERING RESULTS. Structural Condition www.CTLGroup.com Assessment of Ryan Field
PROJECT EXPERIENCE CTLGroup was retained by Northwestern University to perform a comprehensive structural condition assessment of Ryan Field Stadium. The original portion of the stadium was constructed in Client Northwestern University 1926 and 1927. Additional seating was added circa 1950. The current seating capacity is approximately 49,000.
Overview The University wanted to know if there were any immediate safety concerns that needed to be addressed prior to the football season, as well as confirm the feasibility of repairing the structure versus replacement. Results of the investigation were used to help develop a strategy for expansion, upgrading and modernization of the facility.
Our Approach CTLGroup performed a comprehensive investigation of the entire stadium and facade with the following objectives:
Assess the overall condition of the stadium structure. Confirm the as-built stadium was consistent with information shown on the original design drawings. Define immediate structural safety concerns along with required remedial action. Document locations of observed deterioration and determine cause of deterioration. Evaluate durability of the concrete and potential for future deterioration. Evaluate metallurgy, physical properties and weldability of structural steel. Develop recommendations for repair, durability enhancement and waterproofing. CTLGroup worked closely with the Architectural/Engineering design team and the University to provide the information they needed to develop design criteria and renovation program strategies.
CONTACT Carlton Olson 847.972.3244 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Evaluation & Repair of www.CTLGroup.com Concrete Utility Tunnels
PROJECT EXPERIENCE A 65-year old reinforced concrete steam tunnel along Superior Street serves the downtown campus of Northwestern University. Concrete deterioration of varying degrees was evident at Client Northwestern University numerous locations throughout the tunnel system. In addition to steam lines, the tunnel houses other utilities and communication lines. Concrete spalling, rebar corrosion and leakage continued to occur despite numerous maintenance repairs overtime. CTLGroup was engaged as the prime design consultant for a comprehensive repair and upgrade of the tunnel system.
Our Approach CTLGroup performed a comprehensive structural evaluation with objectives to assess overall condition of the tunnel structure, determine need for any emergency repairs, assess structural integrity, and develop repair program options. CTLGroup’s evaluation included:
Visual inspection Establishment of station markings inside the tunnel Nondestructive testing to confirm tunnel structure thickness and reinforcing layout Laboratory testing to evaluate concrete strength, concrete durability potential, degree of chloride contamination and steel reinforcement properties
These evaluations allowed our team to establish the cause of concrete deterioration, cataloged all areas of distress, and make repair recommendations to extend the service life for the utility tunnels an additional 35 years. Northwestern University accepted CTLGroup’s repair recommendations. CTLGroup managed the entire repair process of the tunnel system, including repair design, bidding, contract administration and repair oversight. CTLGroup played a key role in the project’s success. Our strong working relationship with the University and contractor overcame many project issues, helping to limit closures of downtown Chicago streets, minimize hospital and classroom noise disruptions, maintain utility services while tunnel repairs were being performed, and keep the project on schedule.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Leakage Evaluation of www.CTLGroup.com UIC Building 623
PROJECT EXPERIENCE CTLGroup was retained by the University of Illinois at Chicago to evaluate the cause of leakage into the building interior at the College of Education, Communication, and Social Work (Building Client University of Illinois at Chicago 623).
Our Approach During the evaluation phase, CTLGroup identified a deteriorated roofing system and severely deteriorated sealants around and between windows. Brick masonry cracking throughout the facades was attributed to inadequate provision for clay masonry volume changes as well as to inadequate support by the continuous shelf angles at floor levels. CTLGroup prepared a detailed written report that described the findings, conclusions of the evaluation work, repair recommendations and budget estimates. Based on the University’s available budget, CTLGroup prepared repair bid documents with scope-of-work alternates to address the identified problems. Remediation work consisted of shelf angle/through-wall flashing repairs, localized replacement of clay units, repointing of mortar joints, routing and sealing cracks, sealant replacement at windows, and roofing replacement. In addition to bidding assistance, CTLGroup provided the University with field observation during repair construction and worked with the University Architect’s office to provide construction contract administration.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 UIC Building Envelope & www.CTLGroup.com Parking Structure Repairs
PROJECT EXPERIENCE CTLGroup provided condition assessment, repair design and field engineering services associated with facade, roofing, concrete and waterproofing repairs for several buildings on the University of Client University of Illinois Illinois at Chicago campus. Building 606 – Chicago Circle Center Office Building Building 618 – Behavioral Sciences Building Building 621 – Roosevelt Road Building Building 623 – Education, Communication and Social Work Building Building 910 – College of Medicine, East Tower Building 915 – School of Public Health Building 949 – UIC Hospital Paulina Street Parking Garage Richard J. Daley Library Student Union Building Chicago Illini Union Promenade Overview The buildings are diverse in size and complexity, and range in age from approximately 25 to 75 years old. Facades consist of brick, stone masonry or exposed concrete. Common problems included water leakage, corrosion, masonry deterioration and concrete distress.
Our Approach The first phase of each project consisted of assessing existing conditions, determining causes of distress and developing repair strategies with cost estimates. CTLGroup worked closely with the University to develop practical and cost-effective solutions to meet University objectives and budgets. After selection of a repair strategy, CTLGroup designed repairs and developed bid documents. Field observation and contract administration services during repairs were managed by CTLGroup.
Awards Roof Consultants Institute, Outstanding Construction Document Award for Richard J. Daley Library roof replacement, facade restoration and below-grade waterproofing project. International Concrete Repair Institute (ICRI), Award of Excellence for the unique and cost-effective rehabilitation of the Paulina Street Parking Garage
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Paulina Street Parking www.CTLGroup.com Garage Restoration
PROJECT EXPERIENCE The Paulina Street Parking Structure is a six-level, 1100-car parking garage built in the late 1970s. Each supported level consists of post-tensioned concrete beams and slabs. Concerns expressed by the University included the presence of slab and Client beam cracking and spalling. University of Illinois at Chicago
Our Approach CTLGroup’s structural evaluation indicated that the deterioration resulted from corrosion of embedded steel reinforcement. Structural calculations revealed strength deficiencies in several beams and columns. The structure had also previously undergone a repair program that, through the improper use of concrete chipping hammers, led to nicking of numerous post- tensioning tendons. Additionally, some tendons were found to be extensively corroded. In order to reduce repair construction costs, CTLGroup performed a laboratory study to assess the significance of nicked tendons and to develop acceptance criteria for the use of existing damaged tendons. CTLGroup’s repair design included the installation of post-tensioning repairs, strengthening of structurally deficient members, and installation of a bonded, composite microsilica concrete overlay to slab top surfaces. Construction administration and field observation services were performed during repair construction.
Awards International Concrete Repair Institute (ICRI), Award of Excellence for the unique and cost-effective rehabilitation of the Paulina Street Parking Garage.
CONTACT John Vincent 847.972.3242 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 UIC School of Health & www.CTLGroup.com Psychiatric Institute
PROJECT EXPERIENCE The former Illinois Psychiatric Hospital building was taken over by UIC and renovated to serve as a classroom and office building. The exterior wall of the 13-story building consisted of face brick Client and masonry back up with punched anodized aluminum windows University of Illinois at Chicago and an anodized aluminum and glass curtain wall with masonry back up. The interior sides of the masonry walls were glazed clay blocks. The glass was monolithic and the aluminum framing was not thermally broken.
Our Approach CTLGroup was engaged by UIC to evaluate the existing building envelope and facade to determine the condition as a result of repurposing of the building for academic use. Based on the condition assessment conducted by CTLGroup, much of the exterior wall required major repair and replacement. The scope of the rennovation work included removal of the existing punched windows and some of the cladding. All of the curtain wall support framing was left in place as were sections of the existing cladding that were to be over clad. The punched windows were replaced with new windows consisting of a fixed lite of insulating glass glazed in a thermally broken painted aluminum frame. The over cladding was glazed with metal panels. The only work on the interior was a cosmetic sealant joint between the window frame and the glazed clay block interior back up.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Assessment & Repair of www.CTLGroup.com Campus Utility Tunnels
PROJECT EXPERIENCE The reinforced concrete west campus utility tunnels at the University of Illinois at Chicago have a cumulative length of approximately 1.5 miles. The university became concerned Client University of Illinois at Chicago about visible evidence of deterioration and distress in the tunnel system, including cracked, delaminated and spalled concrete with corroded reinforcement, areas of water infiltration and corroded utility support hardware.
Our Approach The university engaged CTLGroup to perform a condition assessment of the reinforced concrete utility tunnels. CTLGroup evaluated the overall condition of the tunnel structure, concrete chloride levels, and the depth of carbonation and cover thickness. The investigation included review of the original design, construction, and repair records; hands-on condition assessment (including nondestructive testing) of the tunnel system; and laboratory testing of concrete samples. When the assessment had been completed, CTLGroup developed and prioritized repair recommendations to help the University of Illinois formulate the most economical repair strategy for its various campus facilities. Taking advantage of CTLGroup’s technical expertise, the University was able to make the necessary decisions to repair the utility tunnels, and to develop more effective maintenance plans for the future.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Krannert Center Parking www.CTLGroup.com Structure Repairs
PROJECT EXPERIENCE The Krannert Center for the Performing Arts Parking Structure was built in the late 1960s and consists of three levels. The lower parking level is a slab-on-grade. The upper parking level originally Client University of Illinois consisted of a column-supported, reinforced concrete waffle slab. The top level, which is a pedestrian plaza, is also a waffle slab.
Overview The University requested an assessment of the facility’s condition and a recommendation for repairs. The upper parking level was deteriorating and patch repair programs conducted for the past several years were costing more and more every year.
Our Approach A condition survey of the facility found extensive spalling, delamination, cracking, and exposed, corroded reinforcing bars. Deck deterioration was attributed to reinforcing steel corrosion. CTLGroup studied repair alternatives, including associated costs, and found that the most cost- effective method of enhancing long-term durability was to remove the waffle slab and replace it with a flat slab. Upon approval from the University, CTLGroup designed repairs that included the addition of slab pitching and floor drains; the use of microsilica concrete in the new slab; installation of oil separators and a sanitary sewer connection for new floor drains; a high-output, energy-efficient lighting system; extensive surface drainage modifications around the facility; and various revisions to toilets, waiting rooms, and pedestrian walkways to comply with the Americans with Disabilities Act. CTLGroup provided construction contract administration and full-time construction observation services during repairs.
CONTACT John Vincent 847.972.3242 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Structural Monitoring of www.CTLGroup.com the UNI Dome
PROJECT EXPERIENCE The UNI-Dome is a multi-purpose coliseum. The indoor facility is a 424-ft-diameter domed structure seating approximately 16,500 for sporting events and 25,500 for concerts. The original UNI- Client University of Northern Illinois Dome was a cable-restrained low-profile air-supported roof with compression ring built in 1976 at a cost of $7.5 million. Three times in its history the dome encountered difficulties that caused the roof fabric to sag, accumulate water and subsequently tear.
Our Approach In 1998, a hybrid roof system was installed to replace the air-supported roof. Stainless steel, standing seam roof panels supported by structural metal deck and bar joists form the skin of the peripheral area of the roof (75% of the roof area). The center 45,000-sq-ft polygon is enclosed with an arch- supported, PTFE fabric tensile roof. The new roof system, further modified since the 1998 reconstruction, utilizes a snow-melting system to prevent snow from accumulating enough to damage the roof structure. To provide a backup measure for the evaluation of the condition of the new roof system, CTLGroup installed a structural monitoring system. The structural monitoring system includes wind speed and direction sensors and strain gages placed on key structural elements near the top of the roof. The strain gages are connected to a data logger that issues an alarm if assigned response values are exceeded for any sensor. The system is accessed remotely for software modification or data retrieval. This system provides continuous, real-time evaluation of the roof structure’s response to high winds, snow-melt or uneven snow accumulation.
Lab Services Sensors
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Long-Term Noise & www.CTLGroup.com Vibration Study
PROJECT EXPERIENCE CTLGroup was approached by the University of Toledo medical research campus to examine the long-term effects of construction noise and vibrations on research buildings on the campus. The Client University of Toledo noise and vibration effects, it was worried, might have a negative impact on the test specimens (animals) within the facilities, potentially causing disturbance on the research being conducted. Our consultants were brought in to determine if the vibrations were to blame.
Our Approach CTLGroup designed and installed a custom noise and vibration monitoring system. CTLGroup also worked with a clinical specialist to develop an alert system that constantly checks the noise and vibration levels and automatically responds to designated individuals if levels exceed threshold criteria. The sensor systems are all developed in-house via CTLGroup’s structural diagnostics and monitoring group. Using a collaborative approach, our consultants were able to provide solutions to the university.
Consulting Services Construction Methods Consulting and Construction Process Review Structural Analysis
Lab Services Sensors
CONTACT Steven Smith Ph.D 410.997.0400 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Spartan Stadium www.CTLGroup.com Structural Evaluation
PROJECT EXPERIENCE CTLGroup provided specialized engineering, testing and consulting services in connection with a capital improvement program and structural rehabilitation for the 76,000-seat-capacity Client VEC Engineering Spartan Stadium located on the Michigan State University campus in East Lansing.
Our Approach CTLGroup performed a comprehensive structural evaluation of the east and west stands that were constructed in 1923. Construction consisted of conventionally reinforced concrete bents supporting stepped reinforced concrete tread and riser seating. CTLGroup’s work included visual condition assessment, nondestructive field testing, laboratory testing, structural analysis, structural strength evaluation, and designing structural repairs for the bents. The rehabilitation program included removing and replacing the tread and riser seating structure and repairing the supporting bents
CONTACT Peter Kolf 847.972.3214 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Thompson Hall Façade www.CTLGroup.com Evaluation
PROJECT EXPERIENCE Thompson Hall, a 19-story student residential building on the Western Illinois University (WIU) campus, was built in 1969. Client Recently, the WIU Board of Trustees elected to have an assessment Western Illinois University study conducted on the building’s aging façade.
Our Approach Before CTLGroup was engaged by Western Illinois University to evaluate the condition of the existing building’s façade to determine the repair or possible replacement of the exterior cladding. CTLGroup conducted document review, visual observations, water leakage testing and infrared thermal scanning of the building cladding to arrive at specific recommendations. The condition study found that the cladding exhibited serious deterioration and questionable structural attachment. The University decided to re-clad the building based on CTLGroup’s findings and to upgrade the HVAC systems and interior finishes. CTLGroup was commissioned by the university to be the Project Architect for the full building renovation. As the Project Architect, CTLGroup selected the architectural and engineering consultants to assist in the design and preparation of construction documents and specifications for the total removal and replacement of the exterior cladding system with a new aluminum frame and glass curtain wall. Legat Architects was chosen and they designed the new cladding system and interior refurbishment of the dorm rooms. KJWW Engineering Consultants was selected to design the upgrades to the building’s HVAC system. The total building renovation will cost $20 million and will include an Proposed attractive and sustainable facade totaling 154,000 sq. ft. The project is estimated to be completed in August of 2013.
CONTACT David Cook 847.972.3236 [email protected]
Frank Laux 847.972.3088 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Vanderbilt University www.CTLGroup.com Medical Center Floor Slab
PROJECT EXPERIENCE CTLGroup performed an independent evaluation of the condition of a mechanical room floor slab and adjacent exterior plaza structural slab located on Level 2 of the Hospital Building on Client Vanderbilt University medical campus.
Our Approach CTLGroup conducted a document review relating to the design and construction of the floor slab. A field investigation utilizing non-destructive tesing was performed to evaluate the extent of concrete delamination, spalling and cracking in the mechanical room structural slab. Sample cores were collected for petrographic and chemical tests. A comprehensive report summarized CTLGroup’s evaluation and findings with recommendations for repairs.
CONTACT John Vincent 847.972.3242 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Steam and Pedestrian www.CTLGroup.com Tunnel Assessment
PROJECT EXPERIENCE The Virginia Polytechnic Institute and State University commissioned a petrographic examination of sample concrete Client cores as part of an evaluation of significant deterioration at Wiley Wilson various locations within their underground concrete tunnel system. Pedestrian tunnels were originally constructed in the 1930s while steam tunnels were subsequently added in the 1970s. Field evaluation revealed delamination of overhead concrete and significant corrosion of embedded steel reinforcement. Petrographic examination of sample cores was used to evaluate the existing condition of the concrete and to identify other possible sources of distress within the existing concrete matrix.
Our Approach CTLGroup performed comprehensive physical and chemical evaluations of the concrete core samples taken from select locations throughout the tunnel system. Results showed concrete of similar composition at both the pedestrian and steam tunnels with an overall ‘fairly good’ rating condition. Cracking and delamination were attributed to corrosion of the embedded reinforcement steel. There was no evidence of deleterious chemical reactions within the cement paste or any other materials-related distress. The cores exhibited prolonged moisture infiltration, which was expected considering age and exposure conditions of the analyzed concrete.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Steam Tunnel Condition www.CTLGroup.com Asessment
PROJECT EXPERIENCE The University of Colorado at Boulder commissioned a comprehensive structural evaluation of its reinforced concrete Client steam tunnel system to assess existing structural conditions and Durrant Engineers develop repair options and recommendations. Various sections of approximately 3-miles of reinforced concrete originally constructed in 1909 had exhibited concrete spalling, corrosion, and leakage. In addition to steam pipes, the tunnels also housed water lines, electrical cables and telecommunications lines.
Our Approach CTLGroup served as the subconsultant responsible for detailed condition assessments, nondestructive testing, materials sampling and generation of as-built drawings. CTLGroup also consulted on the development of repair and construction sequencing recommendations based on a prioritized construction schedule coordinated with both the client and university personnel.
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Façade Leakage Repairs at www.CTLGroup.com City View Condominiums
PROJECT EXPERIENCE The City View Condominiums consist of two L-shaped, 12-story, high-rise towers with turrets on the east elevation near the main entrance. A two-story high plaza is located between the north and Client south towers. The building façade is comprised of brick masonry City View Condominiums walls, concrete balconies and metal-framed windows with precast concrete sills.
Our Approach CTLGroup has performed numerous façade inspections and repair projects at The City View Condominiums; including but not limited to City of Chicago Critical Examination and On-Going Inspections, parking garage repairs and water leakage repair projects. CTLGroup surveyed the affected units for interior damage, interviewed the residents affected by water infiltration, and interviewed the property manager and building engineer. The information gathered was used to develop work scope, generate repair drawings and provide cost estimates for the latest building façade leakage repair project. CTLGroup worked closely with the Association and the selected contractor to implement and water test the CTLGroup-specified leakage repairs.
CONTACT C.P. Bok 847.972.3212 [email protected]
Brian Frost 847.972.3258 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 41 East 8th Street Façade www.CTLGroup.com Repairs
PROJECT EXPERIENCE In 2006 the Forty-One East Eighth Street Condominium Association engaged CTLGroup to conduct the Critical Evaluation periodically required by the City of Chicago. CTLGroup’s Client Forty-One East Eight Street evaluation included a condition survey of exposed exterior façade Condominium Association elements (i.e., concrete balconies, railings, masonry walls, etc.) at the building. Based on our work, we recommended that a façade repair program be performed to address observed deterioration of the exterior concrete and masonry elements, and balcony railing distress.
Our Approach CTLGroup was subsequently engaged to carry out the necessary repairs as defined by the 2006 inspection. Our team began by developing the repair design and bid documents. These included administrative requirements, bid forms, technical specifications and drawings to be used to solicit competitive bids for the proposed repair program. Once the repair design and bid documents were completed, CTLGroup provided the building owner with bidding assistance. After the bids had been solicited, our team held a pre-bid conference with the prospective contractors to answer questions and prepare any necessary addendum. CTLGroup then reviewed the submitted bids, provided the client with a summary tabulation of the bids and recommended a contractor to perform the repair work. Finally, our firm represented the building owner in dealing with the selected contractor and consulted the owner on matters pertaining to the repairs. Our team began by developing an agreement between the owner and the contractor based on the project manual. Once the repairs were underway, CTLGroup performed field observations to assess the general conformance of the work with the project specifications and provided written reports summarizing our observations. When the repairs were completed, our team provided the building owner with contract close-out services and prepared recommendations for maintenance and monitoring of repairs.
CONTACT C.P. Bok 847.972.3212 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Kinzie Park Towers Facade www.CTLGroup.com Evaluation and Repairs
CTLGroup was retained by the Kinzie Park Towers Condominium PROJECT EXPERIENCE Association to provide engineering services for repairs in
Client connection with reported water penetration and air infiltration Kinzie Park Towers Condominium problems at several units within the 34-story building constructed Association in 2001. CTLGroup also performed the City of Chicago’s Facade Critical Examination program to determine if remedial work would be required pursuant to the requirements specified in the City of Chicago’s municipal code for facade evaluations.
Our Approach CTLGroup conducted close-up visual inspections and field trial repairs at several locations via swing stage scaffolding locations to determine feasibility and repair options. The firm identified concrete cracks in the vicinity of reported water leakage locations. Spalls and cracks were routed and sealed using an elastomeric polyurethane sealant. A waterproof coating was applied at column construction joints where necessary. Localized concrete delaminations and spalls were observed at several locations. Deteriorated concrete was removed, existing reinforcing steel was cleaned and coated with a zinc-rich primer, new supplementary steel was installed, and repair concrete was placed. Window perimeter sealants were replaced at reported water leakage locations. All of the window glazing caps (metal-to-glass joint sealants) were replaced and window metal-to-metal joint sealants were replaced. Additional weep holes were provided at reported leakage locations in the window drainage track. Deteriorated hopper window compression seals were also removed and replaced. Localized deterioration of the balcony railing post pocket grout was observed at several locations. The deteriorated grout was removed and replaced. New sealant was installed around the perimeter of the railing post and epoxy was injected into the railing post to prevent water accumulation below the level of the railing post weep holes. All significant repairs to deteriorated façade were completed in 2012 or stabilized with the intent to be completed in the spring of 2013.
CONTACT C.P. Bok 847.972.3212 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Newport Condominium www.CTLGroup.com Façade Evaluation
PROJECT EXPERIENCE Our Approach CTLGroup assisted the Association with the 2008 City of Chicago Facade Critical Examination program (Phase 1). In conjunction with the facade Client inspection program, CTLGroup also performed a field visual review of units Newport Condominium Associates with reported water infiltration. Our findings and recommendations were indicated in two separate CTLGroup reports (one report each for the north and south towers) to the City of Chicago entitled, “Critical Examination Report, Maintenance of Exterior Walls and Enclosures, North Tower/South Tower, The Newport Condominium Association, 4800 South Chicago Beach Drive, Chicago, Illinois,” and dated November 30, 2008. In both reports, CTLGroup recommended to the Association that short-term repairs to the building façade be performed in conjunction with the water leakage remedial repairs in 2009. Recommended short term repairs to the masonry facade included the following: 1. Grind and point all mortar joints between all limestone panels. Rout-and- seal cracks in limestone panels. 2. Provide stone Dutchman repairs, reinforced mortar patches or sealant patches (depending on patch depth and size) at locations of limestone cladding delaminations. The aforementioned repair work items for the limestone cladding are located at the four building corners (over concrete columns) and the middle of the north and south elevations (over concrete shear walls) at both towers. Water infiltration has been reported at approximately 16 units. The majority of these leakages are located along the east elevations of both towers, with some units experiencing leakage from more than two different elevations. You indicated that the Association desires to proceed with the leakage remedial repairs as soon as possible. We recommended that short term masonry repairs be performed in conjunction with leakage remedial repairs since approximately half of the limestone cladding is located at, or in the vicinity of leakage locations. Therefore, by using the same swingstage access equipment to perform leakage and facade repairs, there will be cost savings associated with mobilization/demobilization and overhead protective canopy costs.
CONTACT C.P. Bok 847.972.3212 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 Parking Structures
www.CTLGroup.com
PRACTICE | at-a-glance CTLGroup has been a pioneer in the evaluation and rehabilitation of parking structures. Our experts have developed the leading service highlights industry metholologies for condition assessment, repair and • Pavement Evaluation restoration design techniques and diagnostic methods for service • Asphalt & Concrete Work life prediction. Our global portfolio of work encompasses over • Sub-Bas & Base Issue Investigation a 1,000 precast and cast-in-place, reinforced and prestressed • Precast Concrete parking structurces. CTLGroup’s projects have been recognized by • Post-Tensioning • Repair Recommendations & Estimates numerous awards for excellence in repair design and evaluation. • Repair Inspection CTLGroup experts help clients across the construction and maintenance lifecycle. Our consultants provide materials analysis and design review services during the pre-construction process that result in significant time and money savings. We supply expert troubleshooting, budgetary cost estimation and repair prioritization to assist owners with planning to get construction on track. We evaluate parking structures of all types and ages, design cost-effective rehabilitation plans and develop innovative repair techniques. CTLGroup experts are called on for highly specialized failure analysis and litigation support.
Our Multi-Disciplined Analytical Approach 1. Engineering consulting & troubleshooting Investigation, evaluation, analysis & repair design Cause determination & litigation support Common functional & service life problems Structural catastrophes 2. Structural diagnostics & monitoring On-site behavior monitoring of facilities Nondestructive testing Instrumentation products & services Vibration analysis Load testing Crack & defect analysis & monitoring Structural integrity evaluation 3. Repair & rehabilitation Cost-effective repair solutions to counteract effects of age Programs to extend service life – development & design Structural strengthening upgrades Historic preservation & restoration CONTACTS Construction contract administration Steve Smith, Ph.D. Specialized inspection & testing 410.997.0400 [email protected]
Carlton Olson 847.972.3244 [email protected] BUILDING KNOWLEDGE. DELIVERING RESULTS. www.CTLGroup.com
PRACTICE | at-a-glance REPRESENTATIVE ENGAGEMENTS InterPark Parking Facilities, Chicago facade ordinance inspections and restorations Tropicana Parking Garage Collapse, New Jersey failure investigation Jackson Square Parking Structure, Florida structural evaluation & repair E.D. Jones Parking Structure, Missouri load testing Miami International Airport Parking Garage, Florida nondestructive testing Universiyt of Illinois at Chicago, Paulina Parking Structure, Illinois structural evaluation & repair design
BUILDING KNOWLEDGE. DELIVERING RESULTS. Evaluation of West County www.CTLGroup.com Center Parking Structure
PROJECT EXPERIENCE The West County Center (WCC) is a shopping mall located in Des Peres, Missouri. The WCC incorporates four parking structures. Three of the four parking structures (known as Manchester, I-270 Client CBL & Associates and Ballas) are multi-level structures with asphalt paving on grade used for the lower level, and precast (prefabricated) concrete components for the elevated floor levels. The remaining parking structure (known as Main Mall) is a two-level structure built over retail space, supported by a composite concrete and steel deck structural system topped with a membrane/drainage layer and concrete topping slab.
Our Approach West County Shoppingtown, LLC and West County Parcel, LLC (West County) hired CTLGroup to perform condition assessment of the four WCC parking structures. During the condition assessment, CTLGroup: documented conditions requiring repair, provided repair quantities and associated preliminary unit repair costs, identified conditions warranting immediate remedial measures to address potential life safety concerns, and provided recommendations to protect the public and vehicles from falling concrete until such time that the repairs are designed and implemented.
CONTACT Steve Smith, Ph.D 410.997.0400 [email protected]
Ryan Adams 847.972.3104 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285 National Institute of www.CTLGroup.com Health Parking Structure
PROJECT EXPERIENCE The parking structure of the Building 10 Ambulatory Care Research Facility (ACRF) at the National Institutes of Health (NIH) consists of three levels of cast-in-place reinforced concrete. Client 2 National Institute of Health Each parking level comprises an area approximately 200,000 ft . The garage was constructed in 1980. Since then, two concrete repair and restoration projects have been performed to address issues related to poor quality original concrete and to maintain the garage in a safe and serviceable condition. Recently, NIH discovered areas of loose concrete on the underside of supported deck levels that represented a serious safety concern.
Our Approach CTLGroup was engaged to perform an engineering and laboratory investigation of the parking structure. CTLGroup’s investigation consisted of field evaluation, laboratory testing, engineering analysis and cost estimating activities. Results of the investigation indicated that overall the garage was structurally adequate, but exhibited corrosion-related deterioration that ranged from moderate to advanced. CTLGroup then provided repair design services.
CONTACT Steve Smith, Ph.D 410.997.0400 [email protected]
CORPORATE OFFICE 5400 Old Orchard Road Skokie, IL 60077 800.522.2285