What does 'gauge' measure in sheet metal?

Gauge in sheet metal refers specifically to the thickness of the metal. This measurement system uses a numerical scale where a lower gauge number indicates a thicker sheet, and a higher gauge number indicates a thinner sheet. The gauge system is crucial for tasks requiring specific strengths and durability in metalworking, as different applications may demand different material thicknesses. Understanding this measurement helps sheet metal workers select the appropriate gauge for their projects, ensuring compatibility and structural integrity. For instance, a thicker gauge metal is often preferred for applications requiring higher durability and load-bearing capacity.