Measuring and testing – Hardness – By penetrator or indentor
Patent
1999-03-23
2000-12-12
Raevis, Robert
Measuring and testing
Hardness
By penetrator or indentor
G01N 348
Patent
active
061582727
ABSTRACT:
A method and apparatus for testing structural integrity of a building material. Examples are given for testing the structural integrity of substrate behind synthetic stucco and stucco. The tester has an exposed elongated pointed tip that reciprocates within a casing that is electrically insulated from the pointed tip for safety. The pointed tip has a pointed end with an inclusive angle of sixty degrees. A spring forcibly opposes movement of the pointed tip into the casing, and a scale on the casing shows the maximum force exerted by the spring to the pointed tip. As the pointed tip is pushed through Exterior Insulation and Finish System ("EIFS") synthetic stucco to the substrate sheathing therebehind, an indicator shows the force applied by the pointed tip to the substrate sheathing. Substrate sheathing with acceptable structural integrity will withstand a force greater than a certain calibrated minimum, while substrate sheathing that lacks acceptable structural integrity will not withstand such a certain minimum calibrated force. The method of the present invention uses the tester of the present invention to test the structural integrity of a building material such as, for example, the substrate behind EIFS synthetic stucco.
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