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The Meaning Behind The Black Diamonds On Your Measuring Tape
By RON BAKER
DIYers often wonder about the black diamonds on tape measures. These markers signify 19.2-inch spacing, which is common in construction for framing members like house studs.
Carpenters use "on center" spacing, where board centers align at specific points, like 19.2 inches. This method ensures uniformity, regardless of variations in board dimensions.
The measurement of 19.2 inches is based on evenly dividing an 8-foot-wide sheet of material over the span of five studs. This ensures alignment and efficiency in construction.
Tape measures may also feature markings for 24-inch O.C. spacing and 16-inch wall spacing. These markings aid in accurate layout and attachment of materials during construction.
Depending on the tape measurer, additional features may include an architectural scale or a conduit bending multiplier table, enhancing versatility for various construction tasks.