Overlap percent (%)

There are a few ways to measure the Overlap %, which is a percentage of the overlap within the seam.

The most common formula to calculate Overlap % is:

Overlap % = Overlap / Dim  B

Additional formulas such as:

Overlap % (1.1x) = (1.1 Cover-thick + cover-hook + body-hook – length) / (Length – (2.2 cover-thick + 1.1 body-thick))

There are additional ways to calculate this (e.g., using Ferrolite) and with different factors.