on some tape measure , the first diamond shape at 19- 3/16 inches . I thought may it was for brick layers but it don’t work out . Anybody know what it is ?
Wheaties
The black diamonds set the spacing for factory floor joists.
Thanks – Batman
Wheaties
Believe it can also be used for attic joists and spacing steel studs for walls.
It’s also used for residential framing. Some builders have stated using this lay-out to save a little money on wood. It only saved 1 stud per 8 feet but they still look at it as saving.