Calvin McCall

Calvin McCall's Posts

F-numbers for a Floor Test Section

Sponsored by Concrete Construction, a limited study was undertaken to measure F-numbers on a test section of a floor with three different measuring devices. Read more

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Common Problems with F-Number Measurements

Common problems in F-number measurement arise on many jobs. Following ASTM E 1155 "Standard Test Method for Determining FF Floor Flatness and FL Floor Levelness Numbers," is essential. Read more

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