What the Small Black Diamond on Your Tape Measure Really Means

Small black diamonds on tape measures mark 19.2-inch intervals, dividing a standard 8-foot (96-inch) span into five equal spaces.

These symbols serve as practical reference points for positioning floor joists and roof trusses designed for 19.2-inch spacing.

While standard wall framing typically uses 16-inch spacing on center, the black diamonds allow continue reading …