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  2. Ultrasonic thickness measurement - Wikipedia

    en.wikipedia.org/wiki/Ultrasonic_Thickness...

    An ultrasonic thickness gauge is a measuring instrument for the non-destructive investigation of a material's thickness using ultrasonic waves. The usage of an ultrasonic thickness gauge for non-destructive testing to check material properties such as thickness measurement, is regular in all areas of industrial measurements.

  3. Precast concrete - Wikipedia

    en.wikipedia.org/wiki/Precast_concrete

    The overall thickness of sandwich wall panels in commercial applications is typically 8 inches, but their designs are often customized to the application. In a typical 8-inch wall panel the concrete wythes are each 2-3/8 inches thick), sandwiching 3-1/4 inches of high R-value insulating foam. The interior and exterior wythes of concrete are ...

  4. Speed square - Wikipedia

    en.wikipedia.org/wiki/Speed_square

    Speed squares are manufactured from a variety of materials such as aluminum, steel, and composites such as HDPE. They are also made in several sizes such as 4, 6, 7, 8 and 12 inch, and 25 cm. Embedded degree gradations on the tool eliminate the need for trigonometric calculations and allow for lines to be more easily made.

  5. Noise reduction coefficient - Wikipedia

    en.wikipedia.org/wiki/Noise_reduction_coefficient

    A reverberation chamber is used to test the sound absorption coefficients and NRC of a material. The noise reduction coefficient (commonly abbreviated NRC) is a single number value ranging from 0.0 to 1.0 that describes the average sound absorption performance of a material. An NRC of 0.0 indicates the object does not attenuate mid-frequency ...

  6. Surface metrology - Wikipedia

    en.wikipedia.org/wiki/Surface_metrology

    Surface metrology is the measurement of small-scale features on surfaces, and is a branch of metrology.Surface primary form, surface fractality, and surface finish (including surface roughness) are the parameters most commonly associated with the field.

  7. What's the Actual Difference Between Sheetrock and Drywall? - AOL

    www.aol.com/whats-actual-difference-between...

    1/4-inch drywall: The thinnest of all drywall options, this is most commonly used as a material to mend large drywall holes or cracks. It's ideal for walls with a subtle curve to them as the thin ...

  8. Drywall - Wikipedia

    en.wikipedia.org/wiki/Drywall

    Various sized cuts of 1 ⁄ 2 in (13 mm) drywall with tools for maintenance and installation . Drywall (also called plasterboard, dry lining, [1] wallboard, sheet rock, gib board, gypsum board, buster board, turtles board, slap board, custard board, gypsum panel and gyprock) is a panel made of calcium sulfate dihydrate (), with or without additives, typically extruded between thick sheets of ...

  9. Compressive strength - Wikipedia

    en.wikipedia.org/wiki/Compressive_strength

    In addition to simple compression testing, testing standards such as ASTM C39, ASTM C109, ASTM C469, ASTM C1609 are among the test methods that can be followed to measure the mechanical properties of concrete. When measuring the compressive strength and other material properties of concrete, testing equipment that can be manually controlled or ...

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