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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.

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Washington, D.C. Concrete Scanning Projects that Penhall Worked On

Penhall finds live conduits with the use of GPR

DC concrete scanningA general contracting company hired Penhall Technologies to locate any conduit within an elevated concrete slab at a shopping mall. The contractor wanted to know the location of all conduit prior to trenching to run new electrical lines. Penhall scanned a 4’x30’ section using a GSSI MiniXT, followed up by performing sweeps for live conduit with the RD 8000. Penhall marked all conduit on the surface for visual reference. Also, it was determined which conduits were live, and which ones were not.

Concrete scanning used across multiple locations and floors prior to core drilling on multiple floors

Concrete scanning before core drillingPenhall Technologies scanned 17 locations in American University prior to core drilling. The analyst used a GSSI StructureScan MINI to scan these areas. The customer wanted to know the location of any rebar or conduits running through the areas so he could move the core locations if necessary. To check for live conduits, the analyst used a utility wand to sweep each area for power. GPR only requires access to one side of the concrete. GPR scanning is quick and reliable with results in real time with no processing time.

Using GPR scanning to find rebar and cables in a concrete slab

Find rebar and cables in concrete slab or wallAt a location in Washington, D.C., Penhall  performed some concrete scanning of two areas prior to core drilling.  This ensures that there were no obstructions, such as post-tension cable, rebar, or conduit damaged before drilling.

Use Ground penetrating radar on an elevated concrete slab to locate tension cables

Washington DC concrete scanningIn Tysons Corner, VA, we were asked to scan (5) areas prior to core drilling five 3.5” holes through 6” elevated concrete slab. We were able to successfully locate and drill holes without touching the post-tension cable to secure the integrity of the slab.

Locate post tension cables and detect patterns within concrete slab

Detect rebar patterns using GPR in concreteAt an apartment complex in Potomac, MD, Penhall was asked to cut two area of 2’ x2’ and 10” x 10” openings within a 24” elevated concrete slab.  Prior to cutting, the analysts had to scan each location to make certain that client doesn’t hit any post-tension cable. This ensures the integrity of the slab.

Detect hazards before performing renovations to avoid costly damage to vital cables or conduits

GPR scan to find hazards before renovationPenhall was asked to perform concrete cutting and coring at a hospital in Bethesda, MD. Our team suggested we scan before any cutting began to help avoid costly damage to vital cables or conduits. For this particular project, we scanned (12) areas prior to cutting (3) door openings and (1) square opening.