Metal detectors measure currents induced in ferromagnetic objects to determine their location. Metal detection is used to check for and verify any metal inclusions within the structure. Metal detectors are used as a complement to the radar data collected and are able to positively identify whether an object is metallic and / or ferrous.
A covermeter measure currents induced in ferromagnetic objects to determine their location. A covermeter is usually used as a complement to the radar data collected and is able to positively identify whether an object is metallic and / or ferrous.
Cover-meter is a good complementary technique to Ground Penetrating Radar (GPR) scanning as it can provide an estimate of bar diameter and more accurate depths of cover. Cover-meter results are usually used in conjunction with GPR to supply steel detail on structures.
Pic above: Cover-meter in Use to locate Reinforcement Bars
Depth of cover and bar diameter measurements are usually provided on CAD drawings along with the results from a GPR survey, as well as any other techniques that are used on site.
Example of presentation of NDT results: GPR, Schmidt Hammer, Impact Echo, Cover meter, core results.
GBG investigates a wide range of structures from historically significant buildings to small private residences.
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