Ground Penetrating Radar Concrete Imaging
A local contractor was installing a new security metal detector in the Helena Regional Airport in Helena, Montana. The contractor needed to fasten anchor bolts directly into the concrete floor of the building next to the conveyor belt carry-on luggage scanner, which was fed by an electrical conduit within the concrete. The contractor needed to be sure that he could install the metal detector safely, without destroying any utilities or rebar reinforcements.
How We Responded
Encompass dispatched a technician to scan the concrete area for any utility lines, and to identify all of the steel rebar reinforcements in the concrete slab. The technician used a handheld ground penetrating radar system to scan the concrete floor in the proposed work area. After a few initial scans, the locate technician found that the rebar pattern was not parallel to the walls of the building, and was instead at diagonal angles. Once this was the concrete reinforcement was discovered, the rebar pattern was laid out using tape for easy identification. The technician also scanned the concrete slab at parallel angles to the walls to make sure that any utility conduits that were running diagonal to the rebar pattern would be located.
Results We Delivered
The GPR concrete scan was performed on carpet, so the technician marked the findings in blue painter’s tape. The technician informed the general contractor that the concrete slab was only about four inches thick. The technician recommended that the ceiling of the basement adjoining the area being scanned might have utilities on the ceiling of the basement running underneath the work area, and that the contractor should make sure to check the ceiling of the basement if he was going to drill all the way through the concrete.
Thanks to Encompass Inspections, the contractor was able to perform his work safely, without damaging any existing utilities, and has a sketch of where the utilities are so that he can determine the best places to drill for anchor bolts. Using GPR allowed the concrete imaging to take place in active areas, thus reducing the construction impact costs associated versus having to shut down areas by using a traditional concrete x-ray scan.
Contact Us To Learn More
Encompass Inspections offers Ground Penetrating Radar/Concrete X-ray, Underground Utility Locating, Video Camera Inspection, Leak Detection, and Utility Mapping services for all of Montana including: Helena, Billings, Missoula, Bozeman and surrounding cities. For more information on our equipment and services, refer to our equipment page.
Encompass Inspections offers nationwide service. If you need to schedule a project, please review our locations to locate your nearest technician.