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Expanded Mesh
What is Expanded Mesh?
Expanded mesh is a mesh product that is manufactured from a single sheet of metal or metal coil and is slit and stretched at the same time to create the openings. There is no wastage during the process and the product is simply expanded.
Due to its unique manufacturing process it is deemed a very economical and environmentally friendly product. Expanded mesh can be manufactured from a wide range of different materials such as Mild Steel, Aluminium, Pre Galvanised Steel, Copper and Brass. There are infinite different colours that can be applied to expanded mesh via secondary finishes such as powder coating and anodising.
Expanded Mesh Characteristics
There are two types of expanded mesh, also know as expanded metal or expanded metal mesh.
Raised Expanded Mesh
Raised mesh is measured from the centre of one mesh to the centre of the adjacent mesh, this is referred to as the LW and SW Pitch as shown below. Raised mesh is unchanged from the expanding process where the individual strands are set at an angle to the plane of the sheet which results in a superior strength to weight ratio, enhanced sheet rigidity, good anti-slip properties and an increase in overall thickness of the original raw material sheet due to the angled strands. |
Flattened Expanded Mesh
Flattened mesh is simply a raised mesh which is passed through heavy duty pressurised metal rolls to create a mesh with a flat surface to the sheet. Flattened mesh is generally processed to the same thickness as the original raw material or just below that base thickness. Flattened mesh is desirable where a lower overall thickness is desirable or if a flat surface is required to have greater surface area for example, when welding into a frame. Flattened mesh is measured from the internal opening of the diamond, this is referred to as the LW and SW Aperture as shown below. |
Expanded Mesh Characteristics
Expanded mesh is available in a wide variety of sheet sizes. The items shown on our website are a guide to the standard items we manufacture as standard stock items. The sheet size is descried as LWD and SWD (LW and SW Dimension). The standard sheet sizes are 2440mm LWD x 1220mm SWD and 1250mm LWD x 2500mm SWD as illustrated here. Stock sheets are manufactured to a nominal plus tolerance and are likely to be delivered slightly oversize. If exact sizes are required we recommend this be discussed at the time of order.
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Sheet Squareness
Expanded mesh which is machine run is not guaranteed to be perfectly square. The only way of creating sheets that are reliably square is to cut them after expanding. The illustration below shows how our ‘stock’ mesh can be out of square, cutting to size is a reliable and quick way of overcoming this.
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