Q: Can GPR determine the difference between rebar and
electrical conduit?
A:In most cases, yes we can determine the difference. It is true that rebar and electrical conduits have nearly the same type reaction on the data screen. We are able to differentiate by determining the rebar pattern (spacing and elevation) and when the pattern is broken, in all likelihood, it would be a conduit breaking the pattern. We have an extremely high success rate in applications where we are asked to find electrical conduits in supported slabs or in slabs-on-grade prior to saw cutting or core drilling.
Q: Can GPR tell me the size of a void cavity below ground?
A: GPR can tell the area where the void is occurring, with clearly identified boundaries. GPR cannot however, determine the depth from the top of the void to the bottom of the void.
Q: In a post-tensioned slab, how are you able to differentiate the tendons from the rebar?
A: In post-tensioned structures, we typically find one mat of support bar near the base of the slab. This mat of support bar is generally consistently spaced and remains at a constant elevation. When we use the GPR to determine the location of post-tension cables, we usually find them above the mat of support bar and they usually are "draped" through the slab. The elevation of the cable is usually high near the beams & column lines and drapes lower through the span between beam and column lines.
Q: When you find underground utilities, can you determine what type of utility it is?
A: No we cannot. We can generally find the utility without much difficulty, but we cannot determine if the piping is gas, or water, etc.
Q: How quickly can you respond to an emergency need?
A: In most circumstances, we can have a technician on your site within 24 hours.
Q: What is the maximum distance GPRS will travel to perform
your work?
A: In the past 12 months, we have worked in approximately 30 states and have also worked overseas. We are willing to consider any project location.
Q: Why would I choose GPRS over another similar company?
A: You would be hard pressed to find a similar company. Most companies providing GPR services use GPR as a supplemental source of revenue. GPRS uses it as its only source of revenue. We are using the technology on different projects every single day and we have established a reputation for providing a reliable and value added service.
Q: What type of training do your technicians go through?
A: Each of our technicians goes through a training course provided by our supplier, GSSI, Inc. We also put each trainee with an experienced technician until the trainee has demonstrated the consistent ability to work on a comparable level to an experienced technician providing technical expertise and the ability to get through difficult GPR applications.
Q: Can your GPR equipment be used to scan vertical surfaces or could it be used on a ceiling?
A: Yes. We regularly use our equipment to scan for the location of rebar in concrete columns and walls. On occasion we are also asked to scan from the underside of a floor to mark out the reinforcing steel and any embedded conduits. This is most common when a customer wants to set anchors into a floor for large piping.
Q: Does Ground Penetrating Radar Systems buy
used equipment?
A: Yes, we buy used equipment from other GPR companies. Contact us today as we would be happy to see the equipment and negotiate a deal.
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