Why Some Tape Measures Have Black Diamonds
by Lori Dorn from Laughing Squid on (#78FWE)
Simple Things - Surprising Histories explained why some tape measures use black diamonds to mark 19.2-inch intervals, dividing an eight-foot span into five equal sections. The marks provide a visual shortcut for laying out floor joists and roof trusses.
We explain why tape measures have those black diamonds and how they are used step by step using real math and verified framing methods.
An Inside Look at How a Tape Measure Is Made
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The post Why Some Tape Measures Have Black Diamonds was originally published on Laughing Squid.