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Ground Penetrating Radar Scan Performed in Downtown San Diego, CA

Ground Penetrating Radar Systems, Inc. - GPRS - of Southern California was contacted by a general contractor in Downtown San Diego in order to scan for rebar, post tension cables, or conduits in a concrete deck prior to anchoring. GPRS scanned one area, approximately 20’X40’ in size, and marked all findings directly on the surface with paint at the time of the slab. We found that this slab contained rebar, post tension cables, and conduits running throughout the deck.

GPR scanning is a great tool to use to locate post tension cables, rebar, and conduits. It can also be used to scan for underground utilities, voids, or unknown anomalies prior to excavating, trenching, or directional boring. GPRS has offices throughout the entire state of California and performs projects in cities such as; Murrieta, Menifee, Temecula, Escondido, Oceanside, El Cajon, La Mesa, El Centro, Palm Springs, San Diego, North County, Inland Empire, La Jolla, El Cajon, and Chula Vista, El Centro, Calexico, Alpine, and Imperial. Please contact James Petersen at 858-395-1085 or by email at James.Petersen@gp-radar.com to schedule service, obtain a quote, or to learn more about ground penetrating radar and how GPRS can assist in your projects.

The photo hereshows the area scanned, with the layout of the reinforcing (including post tension cables, rebar, and conduits) marked with spray paint on the surface. This slab was found to be approximately 9” thick, and contained a bottom mat of reinforcing (marked in blue) at 12”-18” on center, a top mat of rebar (marked with yellow dots/lines on blue markings) spaced variously through the slab, and post tension cables (marked with orange) in bundles of four at approximately 6’ on center in only one direction. GPRS was able to locate these items imbedded in the concrete, and accurately mark the locations and depths of the reinforcing to allow the general contractor to drill with confidence and keep unforeseen conditions from adding to the cost of the job.


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