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

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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

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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.