In order to understand how to decide the correct expanded metal pattern and size for your project, it is important to understand what expanded metal is and basic expanded metal terminology.
Expanded metal is a rigid and semi rigid, strong piece of metal that is first sheared by an oscillating knife while simultaneously being expanded into an open mesh pattern. The result is a sheet that is lighter and less expensive than the original solid metal sheet, while still maintaining strength and rigidity.
Expanded metal can also be purchased cut to length (produced to a specific width and length) or in coils (produced to a specific width and then wound onto a core). Coils are typically purchased at 2,000 feet or more.