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 of the sheet. This adds strength and rigidity, allows air circulation and distributes the load on the metal to the supporting frames.
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 thickness and elongating the diamond pattern (LWM).
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 2 strands. It is always the width of 2 strands.
- OVERALL HEIGHT
The actual measurement of the height of the mesh measured at the knuckle.
