Rebar, Post Tension, Conduits? No problem for GPR- Charlotte, North Carolina

Ground Penetrating Radar Solutions - GPRS - of Charlotte, North Carolina was contracted by a general contractor to locate all reinforcement, post tension, and conduits within a concrete slab in order to anchor a trash compactor into the slab. The general contractor needed to avoid all reinforcement as requested by the project engineer. They also wanted to avoid all conduits and post tension to ensure safe drilling. Ground penetrating radar was used to scan larger areas so that the contractor would have options on placement. We were able to tell the client they were dealing with a 2- way post tension slab approximately 12” thick. We informed the client there was a bottom layer of reinforcement, usually rebar, at about 10”, and a banded post tension bundle, near the wall, that we advised the client not to drill any anchor near. There were also uniform post tension cables every 24”-36” in the other direction. We were also able to identify 2 conduits in the area. All the findings were marked on the slab and depths were provided if they were within 5” (max embedment depth). We came back to the site about three weeks later for a different scope of work and the trash compactor was successfully installed with no issues, slow downs, or additional cost.

Photo of GPR findings. Ground Penetrating Radar Systems takes pride in keeping everyone safe on job sites by accurately and clearly marking all reinforcement, post tension, and conduits. GPRS offers other services, such as locating underground utilities before drilling soil borings, digging, or excavating, as well as locating underground storage tanks or tank “graves”. If you need anything scanned in Charlotte or anywhere else give us a call and we will have a SIM certified Project manager on your site as soon as possible.

In the North Carolina/South Carolina area GPRS is usually able to get a project manager out to your site to complete the necessary GPR scans within 24-48 hours depending on the time of the year. To schedule service or obtain a quote, please contact Jim Bell at 704-582-3219, or or visit

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