Concrete Imaging Archive


Concrete Imaging Survey for Town Center Expansion, Stamford, CT

posted Dec 23, 2016, 1:44 PM by Kyle Horst   [ updated Feb 8, 2017, 2:39 PM by Pete Viola ]

Town Center Expansion, Stamford, CTKonover Construction Corporation (now KBE Building Corporation) was hired as general contractor of a major renovation project at Stamford Town Center, Stamford, Connecticut. As part of the renovation they were responsible for drilling, cutting and coring through a post tension slab to install utilities, attach ductwork and anchor suspension beams. To ensure that no post tension cables were damaged during this process, Konover hired us to perform a Level 2 concrete imaging survey. During the course of the project, over 200 locations were surveyed so that drilling, cutting, and coring could be performed without causing damage to post tension cables. This enabled Konover to maintain the structural integrity of the slab, reduce the risk of injury and complete the project on schedule. In 2009, Konover received an Excellence in Construction Award for this project by an independent panel of judges consisting of owners, architects, and engineers.


Slideshow



Written Report



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

Concrete Imaging Survey at Stamford Hospital, Stamford, CT

posted Dec 23, 2016, 1:43 PM by Kyle Horst   [ updated Feb 8, 2017, 2:41 PM by Pete Viola ]

Stamford Hospital, Stamford, CTSkanska USA Building, Inc. was hired by Stamford Hospital to convert unused office space into new medical clinics at 1351 Washington Boulevard, Stamford, Connecticut. As part of the renovations, Skanska was responsible for core drilling through a post tension slab to install electrical, plumbing and communication lines. In addition, large portions of the slab had to be cut for the installation of a four story elevator shaft. To ensure that no post tension cables were damaged during the renovation, Skanska hired us to perform a Level 2 concrete imaging survey. During the course of the project, over 100 core drilling locations and three large saw cutting areas were surveyed. This enabled Skanska to core drill and saw cut without causing damage to any post tension cables.


Testimonial

“I had the pleasure of working with Peter Viola while working with AP Construction in White Plains, New York and due to the quality and professionalism of the services that were performed, he and Underground Surveying were the obvious choice when my then employer, Skanska USA, was looking to hire a company to perform intricate parts of the renovation of Stamford Hospital in Stamford, Connecticut.

The response time to any requests was always timely and there were never any delays nor were there any problems with following the schedule. This was critical when managing such a costly and extensive project. Had we not used such a dependable and knowledgeable company, the potential for costly errors or delays could have been great.

Based on the above, and on other experiences and observations, I would not hesitate to recommend Underground Surveying for any project.”

Pete Zeiss


Slideshow



Written Report




To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

CMU Wall Inspection at UCONN School of Law, Hartford, CT

posted Dec 23, 2016, 1:40 PM by Kyle Horst   [ updated Feb 8, 2017, 2:41 PM by Pete Viola ]

UCONN School of Law, Hartford, CT Whiting-Turner Construction Company hired IMTL, Inc. to inspect the concrete masonry unit (CMU) walls of an occupied building at UCONN School of Law, Hartford, Connecticut. They began the inspection by drilling pilot holes into the blocks to visually inspect inside the wall. Visual inspection revealed that many blocks were not grouted properly and many of the grouted blocks did not contain rebar. Inspecting the entire wall with this method would have wasted too much time and caused too much damage. To avoid these problems, IMTL hired us to perform a non-invasive Level 2 concrete inspection survey using ground penetrating radar technology. This technology enabled us to see inside each block and determine whether it was empty, grouted with no rebar, or grouted with rebar, and this information was recorded and documented in a written report. During the remainder of the project, Whiting-Turner used the information supplied in the report to pinpoint areas of the wall in need of repairs, dramatically reducing the number of pilot holes that needed to be drilled into the walls.


Slideshow



Floor Plan



Floor Plan Legend



Written Report



To learn more about our concrete inspection services, please visit the concrete imaging and inspection services page.

Concrete Scanning for PT Cables at The Centre at Purchase, Purchase, NY

posted Dec 23, 2016, 1:38 PM by Kyle Horst   [ updated Feb 8, 2017, 2:42 PM by Pete Viola ]

The Centre at Purchase, Purchase, NYAs part of a multiple office renovation at The Centre at Purchase, 4 Manhattanville Road, Purchase, New York, Belway Electrical Contracting Corp. needed to core drill through the 4th floor concrete slab to supply electrical and telecommunication services to the newly renovated Guggenheim Partners offices. Prior to doing so, however, there was one big problem: the concrete slab was supported by post tension cables. Therefore, prior to core drilling, they hired us for our Level 1 concrete scanning services. During the survey, 35 proposed core drilling locations were scanned using ground-penetrating radar (GPR) technology, enabling us to mark the location of cables and rebar within an area surrounding each location. The results of the survey then made it possible for Belway to position each core a safe distance away from the potential obstructions. This allowed them to core drill at each location without a single post tension cable or rebar being damaged in the process.


Slideshow



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

Concrete X-Ray for Rebar at Prudential Retirement, Hartford, CT

posted Dec 23, 2016, 1:37 PM by Kyle Horst   [ updated Feb 8, 2017, 2:59 PM by Pete Viola ]

Prudential Retirement, Hartford, CTPrudential Retirement recently performed a major renovation on multiple floors at the Prudential Building, 280 Trumbull Street, Hartford, Connecticut. As part of the renovation, it was necessary for the electrical contractor, Net Services, LLC, and the plumbing contractor, The Wetherell Corp., to drill through the concrete slab at approximately 200 locations to install new electrical and plumbing services. Prior to doing so, however, the building’s property manager requested that a 2′ x 2′ area surrounding each proposed core drilling location be x-rayed to reduce the risk of damaging rebar or conduits embedded within the concrete slab. Therefore, both contractors hired us for our Level 2 concrete imaging services. During the survey, ground penetrating radar (GPR) technology indicated that the suspended concrete slab was approximately 10 inches thick and was composed of both an upper and lower layer of rebar. Unfortunately, this double layer of rebar made it extremely difficult to find conduits at the bottom of the slab, and compounding this problem was the fact that we were not granted access to scan below. As a result, one electrical conduit (located at the bottom of the slab) was damaged during core drilling. However, other than that, over 200 locations were core drilled without damaging a single rebar or conduit. Therefore, as a result of the x-ray survey, both companies were able to run new electrical and plumbing services to the renovated offices with minimal disruption to the existing building tenants.


Slideshow (5th Fl.)



Written Report (5th Fl.)



View Slideshow (19th Fl.)



Written Report (19th Fl.)



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

Concrete Scanning for PT Cables at Allen Edmonds, Stamford, CT

posted Dec 23, 2016, 1:35 PM by Kyle Horst   [ updated Feb 8, 2017, 3:02 PM by Pete Viola ]

Allen Edmonds, Stamford, CTSwenson Construction was responsible for converting an empty retail space into a new Allen Edmonds store at Stamford Town Center, 100 Greyrock Place, Stamford, Connecticut. Prior to installing new electrical conduits and plumbing, however, it was first necessary to core through the suspended post tension concrete slab at 4 locations. To reduce the risk of hitting or damaging post tension cables or rebar, the property manager requested that a concrete scanning survey be performed prior to core drilling. Therefore, we were hired to perform a Level 2 concrete scanning survey. During the survey, ground penetrating radar (GPR) technology was used to help locate and mark both cables and rebar. As the pictures below show, the former were marked out with red wavy lines, the latter with solid yellow. As a result, Swenson Construction was able to core drill through the concrete slab without hitting or damaging any post tension cables or rebar.


Slideshow



Written Report



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

Concrete X-Ray of Slab & Beams at 2148 Broadway, New York, NY

posted Dec 23, 2016, 1:34 PM by Kyle Horst   [ updated Feb 8, 2017, 3:03 PM by Pete Viola ]

2148 Broadway, New York, NYDuring new building construction at 2148 Broadway, New York, NY, Epic Mechanical was forced to make several last minute changes to the mechanical plans. Some of these changes required that core drilling be performed through a newly poured concrete slab, beam, and bulkhead to install new utility services. However, prior to doing so, they needed to determine the location of the rebar, in order to make sure it would not be damaged while core drilling. Therefore, they called and requested a concrete x-ray survey, eventually choosing our Level 2 concrete imaging services. During the survey, an area surrounding each proposed core drilling location was scanned using ground penetrating (GPR) technology. This enabled us to determine the location of the rebar at each proposed core drilling location. As a result, core drilling was performed through the concrete slab without damaging any rebar.


Slideshow



Written Report #1



Written Report #2



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

Ground Penetrating Radar Column Survey at 425 Fifth Ave, New York, NY

posted Dec 23, 2016, 1:32 PM by Kyle Horst   [ updated Feb 8, 2017, 3:05 PM by Pete Viola ]

425 Fifth Ave, New York, NYDelta Testing Labs, Inc. was recently responsible for performing a concrete load study at 425 Fifth Avenue, New York, NY. As part of the study, they needed to determine the rebar pattern in 11 columns located in both the building’s basement and sub-basement. Since construction had already been completed, a non-destructive testing method was required. However, since the building was fully occupied, x-ray was not a viable option. The best method for locating rebar in this particular case was ground penetrating radar (GPR). Ground penetrating radar (GPR) is a non-invasive, non-destructive geophysical surveying technique that is used to provide a cross section image of objects embedded within the ground or concrete. The main advantage of using this method over x-ray is that the signal is completely harmless, so it is unnecessary to be concerned about the safety of the building occupants. Therefore, Delta Testing, who had used our services many times before, hired us to perform a GPR survey. During the survey, a 1600 MHz antenna was used to scan to a depth of approximately 12 inches, providing us with a digital image of the rebar pattern. The pattern was then marked out with chalk on the face of each column, and a report was delivered to document the results. In the end, as a result of having used GPR technology instead of x-ray, not one building tenant was inconvenienced during the survey and Delta Testing was able to successfully complete their load testing study.


Slideshow



Written Report



To learn more about our concrete imaging services, please visit the concrete imaging and inspection services page.

GPR Survey of a Concrete Slab for Westchester Capital, Valhalla, NY

posted Dec 23, 2016, 1:30 PM by Kyle Horst   [ updated Feb 8, 2017, 3:05 PM by Pete Viola ]

Westchester Capital, Valhalla, NYReckson, a Division of S.L. Green was responsible for renovating an office space at Westchester Capital, 100 Summit Lake Drive, Valhalla, New York. As part of the renovation, it was necessary to run new electrical and telecommunication services to the desks in the middle of each room. But to make certain that the lines were hidden from view, the architect requested that a hole be drilled through the floor to run them up from the ceiling below. However, since the building’s suspended concrete slab is reinforced by post tension cables, it was essential that the cables be located and marked prior to cored drilling. Therefore, Reckson contacted us and requested that a Level 2 concrete imaging survey be performed. During the survey, our technicians utilized ground penetrating radar (GPR) technology to mark the location of post tension cables and rebar embedded within the concrete slab at 14 proposed core drilling locations. This provided the architect with the information that was needed to place each core a safe distance away from the post tension cables. As a result, not one single cable was damaged when core drilling was performed.


Slideshow



Written Report



To learn more about our underground utility locating services, please visit the concrete imaging and inspection services page.

1-9 of 9