Locating Post Tension Cables In A Concrete Slab - Raleigh, North Carolina

Ground Penetrating Radar Systems (GPRS) was requested on site at a new multifamily complex in Raleigh, North Carolina to help identify the location of post tension cables in the concrete slab. This application was to scan the slab on grade where the general contractor had used post tension cables. During the final phases of the project, GPRS was able to help identify the location of the cables using GPR. The images below will give you an idea of how we can help identify those unknowns in the slab. For this application, the customer was planning on anchoring fitness equipment and did not want to have a line strike on the cables throughout the slab.

We used a GSSI Ground Penetrating Radar Unit with one specific antenna. The antenna used on this project was a 1600 MHz antenna along with Radio Detection to help identify any potential live conduits that were in the slab. This antenna is useful in many different applications. This specific concrete application was on a slab that was ~6” thick with post tension cables and conduits present in the slab. GPRS is also able to use this antenna on many concrete structures, and slab types to help identify any anomalies that may be present.

GPRS (Ground Penetrating Radar Systems) specializes in GPR for both utility locating and concrete scanning. When concrete scanning, we can identify those unknowns prior to core drilling, anchoring into a slab or saw cutting a slab. The GPR can be used to help identify reinforcement, slab thickness, potential voids that may be present as well as several other applications. With the utility locating aspect, GPRS will help identify both public and private utilities. During the utility locating process, we can use multiple instruments to identify additional unknowns onsite. Additional equipment that we use to help solve what lies beneath are a sewer camera, traceable rodder or even CCTV to complete pipe inspections. Once the locate is completed, GPRS can then GPS all of our findings giving the customer a permanent record of our findings in a map or CAD deliverable.

In the event that you have a project that requires the use of our services or you may be able to benefit from GPR, you can reach out to midatlanticinfo@gprsinc.com or call us at 704.582.3219. Additional information about the services we offer can be found on our website as well: www.gprsinc.com.

GPRS does not provide geophysical, geological, land surveying or engineering services. If you need such services, please contact an appropriate professional.