Helpful Sheet Metal Terms
When dealing with sheet metal, it is helpful to understand the terminology found below:
Decambering: This is a metalworking process that involves removing a horizontal bend or camber from strip-shaped metal materials. This process is similar to leveling or flattening sheet metal, but also results in deforming the edge of the material.
Drip Edge: Often seen on sheet metal, this is formed on the lower edge of a counter-flashing, gravel stop, or drain bar. This edge is typically 30 to 60 degrees, and is formed to prevent water from running or dripping off.
Galvanizing: This is the process of applying a zinc coating to sheet metal, steel or other alloys. The coating is applied through electrodeposition or a hot-dripping method. The purpose of this process is to make sheet metal or steel more corrosion resistant.
Lap Joint: This refers to a seam that is found at the end of a sheet metal product. It is created when one to three inches of sheet metal is placed over another section of material. This eliminates the need for splice plates.
Anodizing: A finishing process that involves aluminum materials. An electrolytic oxidation method is used to create a thin layer of aluminum oxide on aluminum. This is intended to be an extremely hard and durable protective coating. Anodized aluminum can be colored or clear.
Deep Drawing: This is a metal forming process. A forming die is used on a sheet metal blank, and the shape of the metal is transformed. Since the material is radially drawn into the forming die beyond its own diameter, it is called deep drawing.