The diamonds on your tape measure, sometimes known as joist marks, indicate the spacing between each joist center. The distance between each joist mark varies depending on the specific tape ...

"The black diamond on a tape measure is a symbol that represents the centre area between studs in a home or building. It is placed between the 16 and 24-inch markings and is used to distinguish a ...

These marks on your tape measure also referred to as 'joist marks', correspond to the standard intervals between joists. An individual offered an explanation on Reddit, stating: "The black diamond ...