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What Are The Black Diamonds On A Measuring Tape For. They provide a quick visual for the tape user and speed up the measuring process. The black diamonds give you the assistance that you need with your floor trusses. The diamonds start at the 192 inches mark on the tape and can be utilized to help correctly space the floor trusses for a 48 TG sub-floor with a span rating of 20 oc. 1122017 It stands to reason those who make money for building will need tape measures that are a little more in depth than those of us who just get them out.
Today we know that most naturally colored black diamonds get their color from large quantities or clouds of minute mineral inclusions such as graphite pyrite or hematite that extend throughout the stone. Truss layouts or items are usually eight feet in length and when you divide8 feet 96 inches into five you get 192 inches. The mystery of the black diamonds on tape measures The black diamonds which appear every 19 316 on metal tape measures are for spacing I-beam timbers. Several wood-product manufacturers offer I-beam timbers as a substitute for solid lumber floor joists. The diamonds start at the 192 inches mark on the tape and can be utilized to help correctly space the floor trusses for a 48 TG sub-floor with a span rating of 20 oc. They start at 192 inches which was originally used in metric layouts.
What the mysterious black diamonds on measuring tapes are meant for.
This accuracy would be difficult to achieve without these marks because of the decimal point. Getty Images Justin Sullivan The next black diamond is. Today we know that most naturally colored black diamonds get their color from large quantities or clouds of minute mineral inclusions such as graphite pyrite or hematite that extend throughout the stone. Research into the cause of color in black diamonds is relatively recent. They provide a quick visual for the tape user and speed up the measuring process. These diamonds appearat the 192-inch mark and allow the construction workers to make five trusses in an eight-foot space.