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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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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.

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Once you submit this form, a Penhall Company representative will contact you within 24 hours. Thank you for the opportunity to earn your business!


Portland Concrete Scanning Projects that Penhall Worked On

Penhall technologies performs concrete scanning before drilling

Recently a plumbing company hired Penhall Technologies to scan four locations for the remodeling of a new downtown restaurant. The location was above an underground parking structure, and the client wanted to know what was in the slab before core drilling and installing anchors. They made the right decision by calling Penhall Technologies, as several locations were above post tension cables. Some were directly located where they wanted to drill. They made some simple adjustments, and based on our marked locations they could safely move forward. The owner and crew were very interested and excited by the abilities of the Mini XT and how a professional analyst can differentiate targets within the concrete. The entire job only took one hour and gave the client the confidence to move forward and avoid expensive repairs, they plan to call Penhall Technologies again for future projects.

Penhall Technologies locates P.T. cables

Penhall Technologies received a call from Portland, Oregon requesting a scan of several areas, which would be cored later on, in a construction project for condominiums for a local electrical company. The subcontractor gave the analyst photos of the pre-pour structures of the areas being scanned, which were very helpful in analyzing the slab. After some investigation, the analyst discovered that it consisted of several bands of post-tension cables running north and south, as well as east and west. As the day went along, the analyst also revealed that some of their desired locations might have to be reconsidered. Thanks to the photos provided, the analyst was able to save time by showing the subcontractor that some of these locations had to be abandoned prior to scanning and laying out marks on the slab. The sub-contractor was very happy with the analyst’s attention to detail and his willingness to save time by thinking through areas before the scanning took place.

Ground penetrating radar used to detect P.T. cable and rebar

A general contractor hired two different scanning companies to scan for post tension cable on a suspended slab. They were not satisfied with the results. They were aware of Penhall Technologies’ good reputation, so an analyst was called out to the site. First, the analyst did a walk through with the superintendent.  After answering all his questions, the analyst began the work of locating post tension cable and rebar. It was very important to distinguish between the two. The contractor needed to find the space in the ceiling to drill in large anchors for seismic upgrades.  By giving him an idea were not to drill, he was able to establish a hole pattern for the pre-drilling of the steel. The analyst used the mini XT at an 8” setting to perfectly locate what was needed. The contractor was very happy with the results and asked why he didn’t hire Penhall Technologies from the start.

Scan concrete to identify obstructions before core drilling

scanning concrete slab to identify obstructions before core drillingPenhall responded to a customer’s request to perform concrete scanning to identify any obstructions at a site in Hillsboro, OR. We scanned an area of 2″ x 7 1/2″ before it was safe to perform core drilling for the installation of FPS. We were able to locate and avoid the rebar and post tension cable when we finally drilled.

Locate embedded objects within the concrete slab

locating embedded objects withing concrete slabFor this project Penhall scanned for embedded objects within a concrete slab. 2.5″ X 12″ holes were going to be drilled in 7 different areas at a West Linn, OR job site. The purpose of the holes was for water tank footing.

Ground penetrating radar used to scan concrete slab with metal decking

Ground penetrating radar being used to scan concrete slab over metal deckingPrior to flat sawing, Penhall performed scanning for a Portland, OR location for obstructions. We used ground penetrating radar to scan an area that measured 2’ x 2’ on a 7” thick concrete slab. The concrete slab sat over metal decking.

Bridge scan to locate post tension cable before installing a sign

Bridge scan to locate post tension cablesPenhall recently aided in a customer’s sign installation. We located post-tension cables and rebar on a 10’ x 15’ section of a bridge. The bridge was located in Vancouver, WA.

GPR used to scan an octagonal concrete pile at the Port of Portland

Concrete scanning using GPR in Portland OregonOn a cold Oregon winters morn, a Penhall Company core driller and a Penhall Technologies GPR analyst headed out to a pier off the bank of the Willamette River in the Port of Portland. Within the secure confines of terminal five, the 2 man crew lugged the gear needed to complete the task out to a barge 40’ below the deck. To access the work area a telescoping boom lift was used to haul the men and their equipment out over the water to reach the target area where the analyst scanned the two foot in diameter octagonal concrete piles using the GSSI structural scan mini HR.
Penhall was hired by a large construction and engineering firm to drill 2” test cores for an integrity test (crush test). The company’s project engineer did not want any of the reinforcement rebar or vertical pretension cable to be severed in any way shape or form. The workers scanned a five inch penetration where they followed with the test core. Everything went very smooth and as planned, and the project engineer was more than happy with the work that Penhall had done. The construction and engineering firm has since called Penhall back to schedule another job with the request that the same two gentlemen continue their good work in several additional locations.