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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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Seattle Concrete Scanning Projects that Penhall Worked On

Scan concrete for conduit installation

A contractor hired Penhall Technologies for concrete scanning at the headquarters of a well-known technology company. The project consisted of two, six-story buildings. During this phase, the electrician was installing new power and data line conduits on each floor. This required scanning prior to coring holes. The contractor requested to locate openings for their cores to avoid drilling through rebar, conduits and other embedded objects.

Core drill safely with concrete scanning

An electrical company contacted Penhall Technologies for concrete scanning. The client wanted to scan prior to coring in an office building. The job consisted of four floors, and over one hundred proposed coring areas. On the first day of the project, our analyst worked with an employee from the electrical company, making sure they went through each area and found ideal locations for the cores. The slab was relatively straight-forward: rebar scattered throughout, with concentration in the center and sides, post tension cables located in two bands, a concentration of PT cables located in the beams, and conduit which zigzagged throughout the slab. The customer has been extremely happy with the speed and quality of the work.

Scan first to safely anchor down trash compactors

concrete scanningA new apartment complex in Downtown Seattle wanted to anchor down two industrial size trash compactors and one electrical transformer. The client wanted to do this safely, so he called Penhall Technologies. Our analyst scanned the proposed anchor areas and found post tension cables and conduit. However, the client had other proposed areas. Afterwards, our analyst scanned the floor in the first garbage room for the anchors. He found a plethora of rebar and PT cable within the slab, so this wasn’t a viable area for the client. The second garbage room was not nearly as difficult, with only a tricky conduit hiding amongst the rebar. Overall, the client was very happy about the results.

Concrete digital x-ray coming to Seattle in 2018

Our analysts have been working at the I-90 Bridge Light Rail project in Seattle, WA. The job consists of concrete digital X-Ray. This includes set-up, operational safety procedures, post-processing of images to include dissemination of data, and follow-up GPR scanning. The section we are currently working on is the eastern portion of the bridge, each layout is approximately 2’x1’. This composes of three shot locations, and three exposures. For these sections, 1” core holes will be drilled through the slab to anchor a walk bridge/plank. Penhall Technologies of Seattle, Washington will be happy to provide digital x-ray services, state-wide in 2018.

Penhall scans concrete at a new hotel

concrete scanning markings A contractor called Penhall Technologies to scan at a new hotel that l is being erected in downtown Seattle. The job consisted of two small scanning areas next to small non-supportive beams. As the analyst prepared to leave, the contractor explained that he needed scanning in other areas. These were 4’x3’ scanning areas located on sixteen floors in a newly constructed elevator hall. Once the analyst completed the job, he created a field report, then discussed his findings with the client. The customer was happy with the results, so much so, he requested Penhall to come back the next day to scan different areas in the elevator hall.

Ground penetrating radar locates P.T. cable before anchoring bolts to a slab

A contractor on a project in Bellevue, WA hired Penhall Technologies to perform GPR concrete scanning. The client wanted to safely anchor a trash compactor to the slab of a trash room. The anchor bolts required approximately 3” embedments based on the specs. After scanning, it became obvious that the client had to come up with some other solution. Findings showed post tension cables running directly throught that area of the slab in large bundles, and at only approximately 3” deep. This means that the anchors would easily infringe upon the post tension location in slab and risk damaging them.The customer was grateful to have saved time and money by scanning first.

Penhall Technologies performs concrete scanning at Sea-Tac Airport in preparation for installing signage at Arrivals area

concrete scanning in washington stateA client at Sea-Tac Airport called Penhall’s Seattle branch to come and complete six areas. The client was going to perform core cutting to insert signage along the arrival pickup area. The scan found a possible conduit running through the selected area. The analyst discussed the problem area with the client and logged the data into a report. The client was very happy with our analyst, Kent, and the findings.

Determine the integrity of a structure in preparation for addition to building using GPR concrete scanning

locate rebar and cables with concrete scanning In April, over the course of 3 visits, Penhall Technologies completed scanning for our customer who wanted to locate rebar and post tension cables within specific areas on multiple levels of a parking structure. The equipment used was the GSSI SIR3000 and Palm antenna. Due to the location chosen, there was no concern of there being conduit in the slab. The scan data will support engineering and architectural documents to decide if the current structure can support the additional construction of a proposed structure. This customer also chose several smaller locations within the larger scan areas to completely expose the rebar and post tension cable heads to verify that no degradation of the steel had occurred that would impact the building integrity. Pictured are the two largest areas (3 ½’ x 40’ each) as well as one of the chipped out areas with exposed rebar.