Expanded Metal Terminology

Raised Expanded Metal

Raised Expanded Metal is expanded metal  as it comes off the machine. The strands and knuckles are set at a uniform angle to the plane fo the sheet. This adds strength and rigidity, allows air circulation and distributes the load on the metal to the supporting frames.

 Raised Expanded Metal

Flattened Expanded Metal

Manufactured by passing the raised expanded sheet through a cold roll reducing mill. By flattening the sheet, the knuckles and strands are turned down to produce a smooth and flat surface, reducing the overall thinckness and enlongating the dimond pattern (LWM).

 Flattened Expanded Metal

Other Terminology

• LONG WAY MESH (LWM)
  The distance from a point on a knuckle to a corresponding point on the following knuckle measured across the Long Way. LWM is the same as span in grating.

• SHORT WAY MESH (SWM)
  The distance from a point on a knuckle to a corresponding point on the following knuckle measured across the short way.

• LONG WAY OPENING (LWO)
  The distance measured from the inside of the knuckle in the long way.

• SHORT WAY OPENING (SWO)
  The distance measured from the inside of the knuckle in the short way.

• KNUCKLE
  The intersection of two strands. It is always the width of 2 strands.

• OVERALL HEIGHT
  The actual measurement of the height of the mesh measured at the knuckle.