GPRS Enterprises Inc. of British Columbia was contacted by a general contractor who owns a large ranch property in Southlands. A radiant heating system was installed in a large barn where anchoring and destructive work was proposed to take place. New horse stalls were being installed, and the owner wanted to anchor these walls and gates into the concrete slab without compromising the heating system. GPRS visited the site a few days after the initial call, and began work. A combination of ground penetrating radar scanning and the use of a thermal imaging camera made the location of these pipes stand out. The first step was to locate all of the wire mesh in the slab, as well as the tubes themselves. Everything was marked directly on the slab with red (heating) and blue (mesh) wax crayon. The thermal camera was then used to track these pipes as they heated up from a cold start. The differentiation between heating pipe and wire mesh was made difficult by a foam layer that was used to place these tubes in a uniform position at the bottom of the slab. Only with the use of the thermal camera, were we able to accurately locate and resolves all of these critical targets.
The photo above shows the SIR-4000 computing system and 1600 MHz antenna that was used to locate both the steel mesh and radiant pipes in each area. A thermal camera was then used in order to differentiate the tubes from the mesh in the slab. Tube spacing was 6” on center, which matched that of the mesh and made this project slightly more tedious.
The photo above was taken using the FLIROne thermal imaging camera, and shows the radiant heating system in the utility closet. The glowing orange pipes are individual plastic pipes that enter the slab, and recirculate hot water in order to heat the barn from the floor. This system was very efficient, and the tubes could only be seen under the slab for the first few minutes that the heat was turned on from a cold start. After the slab had heated up even a little, the temperature differential between the pipes and surrounding targets were unable to be seen. This project demonstrates that the only way to accurately find critical targets like these is to use multiple different technologies.
Avoid potential risks, costs, and frustrations, and gain peace of mind by having us survey your locations prior to drilling, cutting, or destructively testing. GPRS can be on site within 24 hours of a request in order to keep these important concrete drilling/cutting projects running smoothly.
If your company is in need of any of our concrete scanning services which include plastic or steel conduit location, rebar locating, post tension cable locating, concrete void detection, or buried drain and utility location in the Lower Mainland or greater Vancouver area, please contact:
Jesse Moorhouse at (604) 671-1829 or at firstname.lastname@example.org.