Concern:
When drilling into a reinforced concrete element, one can hit rebar, conduit, or other metal embeds. Drilling into these may cause damage to the element as well as the drill.
Countermeasure:
A device called the PROTEK drill interrupter helps detect metal in the concrete. As soon as the drill bit makes contact with grounded metal piping, conduit, reinforcement steel, etc. the control loop is completed (closed) and the device stops the electricity supply to the drill so that the operator cannot continue to drill through the metal object.
Limitation:
| Triz Description | 11.1: Prepare emergency means beforehand to compensate for the relatively low reliability of an object. |
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| Image sources | Drill Interrupter System (www.geotechsupply.com/protekiidrillinterrupter.aspx visited 18 OCT 2016) |
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