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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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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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Richmond Concrete Scanning Projects that Penhall Worked On

Locate wire mesh with GPR concrete scanning

wire mesh markingsOur Virginia team had a concrete scanning project in the city of Henrico. Our customer wanted to locate any conduits or hazards in a concrete slab prior to core drilling holes. Our analyst scanned four 3’x3′ and four 2’x2′ areas with the GSSI Mini. She found beams, power lines, and wire mesh and marked them accordingly. By having the scan completed before drilling, it enabled the customer to identify safe and open areas to drill without encountering or jeopardizing structural components.


Penhall scans for post tension cables, rebar, and conduit at a dam

Concrete scanning at Richmond dam Penhall Technologies was hired to locate any subsurface objects in a dam including post tension cables, rebar, or conduit. The client needed to drill a core sample from the top of the dam downward to test the integrity of the concrete. Also, the client was planning to use the test sample core to anchor down a crane to perform work on the dam. The analyst who performed the scan used the GSSI StructureScan Mini HR and the RD 7100 to scan two 2’x2’ areas. The GPR results were analyzed and a pattern of wire mesh at  about 9” depth was identified.

GPR finds rebar and post tension cable

locate post tension cable Penhall Technologies performed concrete scanning using ground penetrating radar. The client wanted to locate rebar, conduits, and PT Cable in two areas in an existing apartment building. They needed to drill new holes for new electrical conduits. The analyst used the GSSI StructureScan Mini HR and RD 7100 to scan these areas. Along with the scanning services, the analyst provided 2D scans a 3D scan. The results showed several pieces of rebar and a PT cable running through the scan area.

Concrete scanning for building reinforcement

A construction company hired Penhall to scan a concrete slab in Fort Belvoir. The building was built in 1943, and the project engineer was interested in the type of reinforcing in the slab. The purpose of the inspection was to determine if the structure needed support beams to ensure structural integrity. The analyst used the GSSI Mini XT, to scan a total of nine areas over the course of two days. The inspection determined two separate layers of rebar located in the slab. Penhall Technologies satisfied the customer’s needs by mapping out the rebar pattern in each of the nine areas. The client completed the project  safely.

Scan concrete before A/C duct installation

A construction company hired Penhall Technologies to scan several areas in a high school that was being remodeled. The company wanted to know what was in the concrete slab on two separate floors prior to installing a new A/C duct. The two areas scanned were approximately 7 feet by 3 feet each. To perform this scan, the analyst used the GSSI Mini XT and the electromagnetic detection utility wand to check for live power. The scans indicated several conduits and rebar, as well as wire mesh. With this information, the customer could determine where to cut safely.


Scan to locate hazards prior to drilling into concrete

Penhall Technologies of Richmond, VA was hired to locate hazards in a building through the execution of GPR concrete scanning prior to core drilling approximately 50 holes. The client was renovating their building and needed to put in new electrical conduits and run them through four floors. The client looked to Penhall to scan the areas first to prevent any shut down of power. Results showed the troughs and crests of the pan decking as well as wire mesh. The analyst also detected possible rebar in one area. Thanks to the results, the client completed the project safely and on time.