GPRS was contacted by DNG Concrete Sawing to assist them prior to core drilling several holes in a new Marriott Hotel.  This hotel is a cast in place, post-tensioned structure and it is critical that none of the post-tensioning gets cut when making penetrations into the slabs.

The drilling was primarily for mechanical penetrations that were moved after the slabs had been poured.  Scott Clay, who runs GPRS operations in the Dallas area, was able to scan approximately 30 locations where the cores were to be drilled in one day on the job site.  All of the post-tensioning and rebar was marked directly onto the concrete surface, allowing the cores to be placed safely and without jeopardizing the integrity of the structure.

Ground Penetrating Radar offers another unique benefit when it comes to determining the location of rebar and post-tensioning.  There is no radiation hazard associated with GPR, so this work can be performed during normal hours of operation without having to clear areas as is necessary when using traditional “X-ray” methods.

The image above shows the reactions from the post-tensioning cable and rebar where cores were to be drilled.	GPRS technicians are able to mark the location of embedded elements, such as rebar, post-tensioning, and electrical conduit directly onto the surface.

Contact Matt Aston, [ 419-490-8460 ]
president of GPRS, to schedule a quote, or for an on-site
presentation of what Ground Penetrating Radar can do for you.