Post tension cables, electrical conduits, rebar and other structural steel, water pipes and various other objects are often found in concrete slabs. Construction companies, plumbing contractors, electrical contractors and renovation specialists are always in need of either core drilling through a slab or trenching through a slab on grade. Whatever the case may be, Ground Penetrating Radar Systems has an expert level of understanding when it comes to the need to “x-ray” or radar before you go penetrating a concrete slab.
In Melbourne, FL there are constantly needs arising when it comes to this. A local plumbing contractor was tasked with relocating some existing plumbing lines. Having used GPRS a time or two before, they felt confident the professionals there would be able to give them the attention needed to get through the slab without cutting anything critical and that they could locate the plumbing lines to be moved.
GPRS showed up on site and used the 1600 MHz and 400 MHz antennas to scan the floor. The professional on site scanned the entire area in a grid pattern to assure that there was no mistaking the location of the plumbing. Contractors only like to cut through a slab once if they can help it. After mapping out the areas, the GPRS professional used markers to indicate where the plumbing was located. These findings were then relayed to the site contact to ensure all information was accurately communicated. The client was able to penetrate, cut and trench in the areas scanned without hitting or cutting any electrical conduits or critical structural steel. The client expressed gratitude on the quick turn-around time and skill the technician brought to the project. Clients who use GPRS know they are getting the highest level of service when using our product.
You will see a picture below depicting Nate Schmoe, of GPRS, Inc. scanning the slab on grade surface.
If you would like to receive a proposal for similar work please visit the “Contact-Us” page at gp-radar.com.
The ancient Prairie Cemetery, south of Lake City, is being examined from above and below to find graves of loved ones buried there.
Riverside teacher and Lake City councilwoman Brenda Hutcheson spearheaded a project in January to reclaim the overgrown cemetery on County Road 812, one-and-a-half miles east of Lunsford.
“The cemetery has been overgrown with vines and brush for years,” Hutcheson said. “My husband Donnie (Hutcheson) and I were raised in the Prairie Community, and wanted to do something about cleaning it up. We only found two stone headstones at first, but remember there being over 20. Many markers had been wood and they were gone.
“We contacted Craighead County Judge Ed Hill about getting help from the county road crew to remove the thicket covering the cemetery. The road crew brought heavy equipment and removed 30 dump trucks of brush and debris.”
Hearing the story on KAIT-TV, Mike McGuirt, a teacher at Westside, brought his drone to the Prairie Cemetery to take photos before the county workers began and afterwards when the property had been cleared.
Volunteers came to the cemetery on Saturdays during February and March to rake and clean the surface of the cemetery. They probed for unmarked graves and located a third stone marker and a metal grave stake. ASU Archeologist Dr. Julia Morrow and her assistant Brandy Dacus examined the cemetery and advised Hutcheson as how to document the findings.
“Calls came in from everywhere giving me information about loved ones buried there,” Hutcheson said. “This has helped us uncover a lot of information about the people who lived in this area, as well as nearby schools, and organizations. Our desire is to give those buried here a proper resting place.”
Surveyor Michael Daniels, with the Bureau of Land Management, visited the site to look for what was first believed to be a section marker. The marker turned out to be the base of another tombstone.
Wilma Johnson Freeman, of Jonesboro, contacted Hutcheson to report five members of her Watkins family were buried there from 1892 through 1913.
“Wilma and her husband Ron Freeman came to the cemetery in hopes of finding the unmarked graves of their family,” Hutcheson said. “The Watkins family was willing to sponsor the cost to hire GPR scanning of the cemetery to find graves. Mrs. Freeman contacted Ethan King, project manager with Ground Penetrating Radar Systems, out of Little Rock, and he did the work last Saturday.”
King found 14 more grave sites on the cemetery property, much to the pleasure of the Freeman and Watkins family.
“We believe we have found our Watkins family members on the south end of the Prairie Cemetery,” Mrs. Freeman said. “My cousin Sandra Whitmire and her friend Dwight Baker have already placed the cemetery on the Find-A-Grave site, listing the three headstone names, with hopes of soon adding our Watkins family to the listing.”
“Donnie’s cousin Harold Hutcheson, owner of Hutco Inc. of Paragould, also lived in this community growing up and has offered to construct an arched metal sign with the cemetery’s name on it after work is completed,” Brenda Hutcheson said. “He and his wife Viva came over here to work and have been great supporters of the project.
“Landowner Jim Moore has pledged his support in making sure we have enough space to clear the property and erect a fence when work is completed,” she said. “It didn’t take us long to see how interested people are in the work being done here. Even students from Riverside School and ASU came out to work. Local farmer Lynn Nall helped level the site for mowing at a later date.
“Now we are just waiting for the printout with the GPR results so we can purchase small concrete markers to identify the found grave sites. When we are finished we want to list the names of all those buried here on a marker near the metal arch out front. We are trying to raise money to pay for those and have already received several donations.”
As a Project Manager with Ground Penetrating Radar Systems, every once in a while, you’ll find yourself scanning through an endless field, under a cloudless sky, before a backdrop of the Oquirrh Mountains, all while focusing on a scrolling Radargram–basically a dream job.
You’re confident that there’s nothing in this field, and your site contact is confident that there’s nothing in this field, but your site contact’s customer has the policy to scan the ground before ANY penetrating of the ground (even if they’re just skimming off the top couple of feet to collect fill dirt). So you scan…and scan…and scan…and scan…then you STOP.
At times like this, the value of extensive training, attention to detail, and diligence becomes evident. Had the old drainage line (marked in red, per the customer’s request, for contrast purposes) that I found with my radar been found with an excavator’s scoop, that would have constituted a Stop Work Event, causing delays, expenses, and frustration.
Nothing that travels around in a GPRS truck has more money and attention invested in it than the Project Manager in the driver’s seat. Our customers depend on not only our impressive suite of tools, our network of experienced radar technicians that covers all of the US and Canada, or our exemplary response time. But also, unknowingly, they depend on the intense, unrelenting, and unapologetically maniacal emphasis we place on problem-solving, attention to detail, and safety.
To each his own, but if you found yourself nodding your head while reading this article, then your company probably suffers from (read: “prospers because of“) the same maniacal adherence to good values. If that’s the case, then we should consider doing some business together. You will be joining a long and growing list of customers who can’t get enough of our “obsessive enthusiasm” for getting their job done right and right away.
Give your local GPRS Guru a shout.
Don’t be fooled by the lofty view, Chicago was nick-named the windy city for a reason!
As winds are raging, GPRS scans tight spaces atop a 48-story building in Chicago, IL. We were able to map out rebar so the general contractor could safely drill anchors for future building plans. High or low, GPRS is here to help you on any subsurface locating you need to finish your project safely and timely. Don’t hesitate to call your nearest GPRS technician today!
Scan before you plan! This ensures worker safety and saves valuable time by targeting specific areas of concern. GPRS can also provide GPS reports overlaid on Google Earth or overlay information on pre-existing CAD files for future building plans. This is all done in a safe, time efficient, non-destructive manner.
GPRS assists by giving a real-time depth view of subsurface hazards such as reinforcing, utilities, conduit, underground storage tanks, voids, etc. This reduces the likelihood of subsurface obstruction strikes during core drilling, saw cutting, trenching, soil boring, directional drilling, anchoring, and other sub-surface applications.
Ground Penetrating Radar Systems uses the GSSI (Geophysical Survey Systems, Inc.) Sir-4000 technology in locating. GPRS also uses the RD-8100 Locator to locate live power and radio frequency (RF) signals underground. We can also detect utilities in or under concrete via induction or conduction with an exposed or known surface utility line.
Time is a primary currency traded on any given construction project. At Ground Penetrating Radar Systems, our everyday efficiency in operations allows us to respond to the immediate needs of our customers, often within 24 hours or less. (gp-radar.com)
For questions or quotes on any subsurface locating in the Greater Chicagoland Area with fast response times and easy scheduling, please contact:
Greater Chicagoland Area
Also, feel free to check out our website or subscribe to our newsletter using the following link!
Ground Penetrating Radar Systems, Inc. – GPRS – of Southern California was contacted by an engineering firm in order to scan for post tension cables on the third level of the parking structure. The purpose of the work was to repair post tension cables throughout all the levels of the structure due to many of the cables snapping or no longer sustained the proper amount of tension. The client needed areas marked out prior to chipping through the 6” thick slab. We scanned (7) 10’x4’ areas on level E and marked all findings on the surface with spray paint. We marked all post tension cables with red paint, rebar was marked with blue paint and beams were marked with pink paint.
GPR scanning is a great tool to use for post tension cables, rebar, and conduits; it can also be used to scan for underground utilities prior to digging or excavating. GPRS has offices throughout the entire state of California and performs projects in cities like; Ventura, Santa Barbara, Thousand Oaks, San Luis Obispo, Bakersfield, Lancaster and the greater Los Angeles area. Please contact Alfredo Espinal at 805-729-5877 or email@example.com to learn more about ground penetrating radar and how GPRS can assist in your projects.
To schedule service or obtain a quote, please contact Alfredo Espinal 805-729-5877 or firstname.lastname@example.org.
A contractor investigating the structural components of a post tension building in Washington DC contacted Ground Penetrating Radar Systems of DC for concrete scanning. The contractor hoped to find valuable information about the reinforcing and post tension cables of the building before core drilling for anchors on the slab edge. GPRS was able to mark the depths of the reinforcing and cables accurately. GPRS scanning assists contractors by reducing the likelihood of subsurface obstruction strikes during drilling, cutting, trenching, anchoring and other sub-surface applications. Ground Penetrating Radar Systems, using GSSI Sir-3000 technology, located the critical post tension cables in the slab which allowed contractors to avoid a possible cable strike. GPRS has used different GSSI antennas to accommodate for ceiling work or even work in tight spaces giving clients data up to 1” close to walls or objects. Information was given in real time, giving the contractor quick results with a safe place to drill in each location. This was all done in a safe, time efficient, non-destructive way.
If your company needs reinforcing or post tension mapping in the Northern Virginia, Washington D.C. Arlington, Alexandria or surrounding areas with fast response times and easy scheduling, please contact Stephen Yant at 703-851-3853 or at Stephen.Yant@GP-Radar.com.
On December 19th 2016, Ground Penetrating Radar Systems (GPRS) was requested on site by a general contractor to perform a Ground Penetrating Radar (GPR) survey at the Cleveland Clinic-Richard E Jacobs Health Center. The contractor needed to saw cut a trench to install new plumbing lines and remove existing drains. The contractor needed to know if there were any conduits in the area to avoid saw cutting through them. GPRS located two active electrical/data banks of conduits going directly through their saw cut area. The conduits were painted on the surface with depth indications so that the contractor could safely saw cut over or around them without hitting the conduits. The hospital had no drawings showing the banks of conduits. Without GPRS on site, the contractor would have saw cut through them as they were right at the bottom of the concrete slab. Before you saw cut or core drill, call GPRS to know what’s underground!
The pictures below show the banks of conduits marked out on site.
Ground Penetrating Radar (GPR)
- GSSI SIR – 3000
- GPRS uses a Geophysical Survey Systems Inc. (GSSI) SIR-3000 Radar unit. This is the most advanced GPR available. It allows for onsite interpretation, as well as stores data for later processing. This equipment is self-calibrating, allowing more precise depth and location measurements.
- 1600 MHz Antenna
- This antenna allows data collection to a maximum depth of approximately 18”, depending on concrete conditions
Ground Penetrating Radar Systems is the best way to ensure the locations of reinforcement and conduits prior to saw cutting/drilling through concrete. For more information on how GPRS, Inc. can help you on your next project, please contact Micah Stair at 330-639-8933 or by email at email@example.com. We also have the capabilities of locating underground utilities, UST’s, and voids.
Ground Penetrating Radar Systems, Inc. was recently contacted to clear numerous anchor locations on the top deck of a parking garage located in Grapevine, TX. The contractors on site were tasked with installing numerous anchor plates throughout the top deck to install permanent barricades and other features, and needed to confirm that post tension cables or other anomalies would not be hit. As other work was being performed in the vicinity, the contactor needed to confirm all locations in a very timely manner and ensure worker safety.
Gasten Schoonover with Ground Penetrating Radar Systems, Inc., was contracted to scan each anchor location and was able to clear 100 plate mounting locations in a single day. GPRS was able to provide much needed information to move their project along at an expedited pace. Gasten Schoonover, using Ground Penetrating Radar, was able to accurately mark out all post tension cables and rebar in the area, and clear each individual plate location for mounting. By locating all post tension, Ground Penetrating Radar Systems, Inc. was able to save the project future time, money, and ensure safety on site. Due to Ground Penetrating Radar Systems, Inc.’s quick response, rapid turnaround, quality of work, and industry-leading technology, we were able to ensure no disruptions were encountered and a very quick start and finish to installing each plate.
Ground Penetrating Radar and Radio Detection equipment is cost effective, non-hazardous, and provides accurate data in real time. GPRS can also provide detailed reports, GPS layouts, AutoCAD and many other services. Ground Penetrating Radar Systems, Inc. is the nation’s largest company specializing in the detection of underground utilities and the scanning of concrete structures, has been in business for over 15 years, and has performed concrete scanning, void detection, UST locating, and underground utility locating projects for over 30,000 customers throughout the United States, the Caribbean, and Canada. Ground Penetrating Radar Systems, Inc. uses industry-leading equipment, provides industry-leading results, and keeps your projects on time.
For service in the North Texas or surrounding areas, or a quick quote, please contact Project Manager Gasten Schoonover at (817) 757-9527 or email Gasten.Schoonover@gp-radar.com.