What does the term “gauge” refer to when referencing sheet metal?

The term “gauge” specifically refers to the thickness measurement of sheet metal. In the context of sheet metal fabrication, gauge numbers are used to indicate the thickness of the metal; a lower gauge number corresponds to a thicker sheet, while a higher gauge number signifies a thinner sheet. This standardized measurement allows for uniformity and consistency when specifying materials for construction and manufacturing.

Understanding gauge is essential in fields like aviation and automotive engineering, as different applications may require specific thicknesses for structural integrity, weight considerations, and durability. It is important to note that while the weight, tensile strength, and melting point of metal are significant properties, they are not what gauge directly measures. Instead, gauge serves as a vital reference for determining the suitability of the metal for various applications based on its thickness.