I have a 12' Stanley Leverlock tape measure that has small black diamonds @ 19 & 3/16, 38 & 3/8ths and so on.

All tapes have these same markings. I've asked people in the trades and have struck out. Does anybody out there know what these markings indicate?

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  • Shaula
    Lv 7
    1 decade ago
    Favorite Answer

    The so-called diamond mark is actually positioned at exactly 8/5 of a foot (that's exactly 1.6' or 19.2 inches, which is indeed pretty close to 19" 3/16 ).

    The diamond marks are also called "black truss" markings, because they correspond to the truss layout which is used with 8-foot sheets of plywood (or other material), namely 5 trusses per sheet.

    This is to be contrasted with "red stud" markings which appear every 16 inches by showing the corresponding inch number in red instead of black. The black markings and the red markings coincide at 8-foot intervals (96 inches).

    That is to say: 5 black intervals or 6 red ones in an 8-foot width.

    5/8 = 0.625 is a standard slope for a roof, which may thus be built by measuring horizontally as many diamonds as there are vertical feet.

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  • 3 years ago

    Stanley Measuring Tape

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  • 4 years ago

    This Site Might Help You.

    RE:

    I have a 12' Stanley Leverlock tape measure that has small black diamonds @ 19 & 3/16, 38 & 3/8ths and so on.

    All tapes have these same markings. I've asked people in the trades and have struck out. Does anybody out there know what these markings indicate?

    Source(s): 12 39 stanley leverlock tape measure small black diamonds 19 3 16 38 3 8ths on: https://tinyurl.im/0BOpI
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  • milks
    Lv 4
    3 years ago

    Stanley Tape Measure

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  • 4 years ago

    For the best answers, search on this site https://shorturl.im/axPai

    The diamonds are placed at 19.2" apart for what is call a T.J.I or truss joist, I joist...floor system. Look up TJI at the Weyerhauser engineered lumber site. In certain commercial applications the joist must be spaced on center at this dimension. Not used much in home industry but is used well enough to make it a permanent label on most tape measures...

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  • 4 years ago

    Joist spacing is quite common at 19 1/4". That is what the diamond indicates.

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  • 5 years ago

    Maximum width of stud centers allowed on Government projects. Seriously!

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  • 1 decade ago

    they are truss layout markings...although i have never used them...because we put truss layout on either 16 or 24 inches,hope this helped

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  • 1 decade ago

    I have asked the same question of my carpenter friends... Now we know.

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