Commitment to Safety • Reliable Results
Responsive Resources • Established Expertise

Penhall Technologies can help you locate rebar, pipes, post and pre tension cables, conduits and many other subsurface hazards that may be hidden in concrete. Our expertly trained analysts can also detect voids within or underneath concrete slabs. As a safety leader in the industry, contractors, engineers, and government agencies have come to trust Penhall first for safe and precise scanning services.

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I can confirm this is a private locate. For all public locates please contact 811.

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What are we scanning? Slab on grade, suspended slab, etc.

What are we scanning for? Ex. rebar, tension cables, conduits, etc.

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What is the surface that we are performing the locate on? Ex. Ground/Dirt, asphalt, concrete, indoor/outdoor, etc.

What are we locating? Water, gas, electrical, sewer, etc.

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Charleston Concrete Scanning Projects that Penhall Worked On

Locate post tension cables before remodeling

Charleston concrete scanning Penhall Technologies conducted concrete scanning in 20 locations at Beach Resort. The resort had been bought by a new company and was undergoing major renovations. Our job was to scan and mark the locations of post tension cables, so that core holes could be drilled safely. The core holes were for a new plumbing going into the resort. The analyst used orange spray paint (customer requested) and the GSSI Mini HR to mark out the locations of each post tension cable. Penhall Technologies was to meet the customers’ expectations and the client completed the project in a safe manner.


Concrete scanning provides 2D profiles and 3D volumes to determine the integrity of walls

concrete scanning to determine the integrity of building wallsA local contracting company hired Penhall Technologies to scan and map a concrete wall inside a hospital in Charleston, SC. The hiring company wanted to know how much structural rebar was in the concrete wall and in what direction the rebar was going. The project engineer wanted to know if the wall was originally engineered to support the added load of a second story. Penhall Technologies scanned the wall with the Structure Scan Mini HR from Geophysical Survey Systems Inc. (GSSI) collecting both 2D profiles as well as two 3D volumes. The 2D profiles were used to map the rebar at the surface while the 3D volumes were used to map out the rebar to deliver to the structural engineer. Penhall Technologies was able to exceed the expectations of the client by not only locating the rebar, but marking them out on the surface in real time and providing limited technical support viewing the delivered 3D volume. The project was completed in a safe and non-destructive manner.


Locate and mark rebar and post tension cable to ensure safety when core drilling

locate and mark rebar and post tension cable in concrete slabPenhall was contacted to perform concrete scanning on 150 separate areas at a central location in Charleston, SC. We used ground penetrating radar to locate rebar in preparation for the core drilling on the 5” thick slab.