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How To Measure Expanded Metal?

Jul. 28, 2021

Our customers sometimes find themselves confused as to which measurements they should provide in order to select the most appropriate grid pattern for their application. The expanded metal supplier provides guidelines on how to measure expanded metal sheet sizes and flattened expanded metal dimensions.


What's the difference between Raised and flat meshes?

When measuring expanded metal mesh, the first thing to consider is whether the mesh is raised or spread flat. Both have a unique set of terms to measure their respective measurements.

Expanded metal in its original form always has a raised appearance and is characterized by the unique "slit and stretch" movement used to manufacture the product. It exhibits tangled strands that slope away from the sheet plane.

Raised or standard expanded metal panel

The raised mesh is prized for its angular appearance, which not only gives it a strong aesthetic appeal, but also provides practical benefits: it provides grip underfoot, the ability to channel air, liquids, and light, and provides a key when used as a substrate.

Common applications for raised grids include sidewalk ramps, security fencing, interior, and exterior decorative architectural cladding, and slats for render and stucco.


Secondary processing is commonly applied to sheet metal mesh, which utilizes heavy rollers to flatten angled strands. The end result is a completely two-dimensional sheet with the strands in the same plane as the sheet. Flat wire mesh is often supported when a flush finish is desired.

The Expanded Metal for Building Facade in Israel

The Expanded Metal for Building Facade in Israel

Flat meshes

Flattened expanded metal comes from passing the raised expanded metal panels through cold roll flattening press, which flattens the strands and bonds surface and reduces the thickness, and elongates the pattern.

Common applications for flat meshes include safety divider meshes, conical air filters, and machine guards.

How do I measure a raised mesh?

The key measurements for raised mesh are Long Wire Spacing (LWP), Short Wire Spacing (SWP), Strand Width (SWDT), and Strand Thickness (STK).



The LWP measured from knuckle to knuckle or center to center level is derived from the tool dimensions used in the production process.


SWP measured vertically from joint to joint or center to center is represented by the overall expansion applied during the manufacturing process.


SWDT is a measurement of the width of the angle line generated during the manufacturing process.


STK is a measure of the thickness of the starting raw material. Contrary to belief, the expansion process does not directly change the material thickness. Strand thickness should not be confused with the overall height or depth of the metal mesh. Typically, the height of the mesh can be 1-2 times the SWDT measurement.

The Important Data of Expanded Metal

 The Important Data of Expanded Metal

How do I measure flattened expanded metal dimensions?

The key measurements for flat meshes are the Long Wire Aperture (LWA), Short Wire Aperture (SWA), Strand Width (SWDT), and Strand Thickness (STK).


LWA is measured from the internal aperture point to point horizontally.

SWA is measured vertically from the internal aperture point to point.


While the expansion process does not change the material thickness, the spreading process does. After the flattening process, a 10-20% reduction in the material thickness is typically observed. Since the grid is completely two-dimensional after flattening, the overall height of the grid is measured similarly to the starting material thickness, with an additional 10-20% reduction margin.


How do I specify sheet size and orientation?

Sheet metal meshes exhibit different mechanical and aesthetic properties when sheet sizes are oriented at opposite angles. When specifying sheet size, the orientation of the diamond relative to the sheet size should also be considered. The terms used to describe the orientation are Longway Mesh (LWM) and Shortway Mesh (SWM).


For example, when a raised mesh is used as a sidewalk ramp deck, the surface grip is strongest when the rhombus runs left to right underfoot. Alternatively, in the security fencing industry, it is common to install extended mesh fence panels with the diamond shape running long toward the sky. This creates a narrower opening and inhibits the ability to climb and scale the fence.

Find a professional metal mesh supplier 

Ares mainly responsible for the sales of expanded metal, perforated metal, safety grating, and architectural decoration meshes. So far we have obtained a number of utility model patent certificates, also we get the chance to cooperate with many well-known enterprises at home and abroad, participating in the construction of high-end projects such as UIC in Singapore, Westin Hotel in Sweden, Hong Kong Opera Center, Beijing New Airport and so on. If you want to get more information about the best-expanded metal mesh wholesale, welcome to contact us today or request a quote.  



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