About Expanded Mesh

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Indomesh Expanded Mesh

Light and cost efficient

It is a great advantage that expanded metal is not assembled nor welded, but always made in one piece:

No metal is lost in the expanding process, hence expanded metal is a cost effective alternative to other products.

Because there are no strained joints or welds, expanded metal is stronger and is ideal for forming, pressing and cutting.

Due to the expansion the weight per metre is less than that of the original sheet.

Due to the expansion a much bigger open area is possible compared to other similar products.

Greater strength
The three-dimensional shape of the meshes is another advantage since the areas where the meshes meet are strong and enable the material to stand a far heavier point load than similar products or a flat sheet.
Anti-skid qualities
Some patterns have a type of mesh with special qualities that not only make the surface non-skid, but also give the expanded metal water and wind repellent qualities. Ideal for secondary operations
Indomesh Expanded Metal is ideal for secondary operations. To save time and to help reduce your costs Indomesh offers to handle the secondary operations for you. It could be flattening, bending, welding, hot dip galvanising, painting or anodising of the Indomesh Expanded Metal.

What is Expanded Metal?
Expanded metal is one continuous piece of sheet metal presses into network of regular diamond shaped meshes with no cracks, joints or welds, with a fascinating production process that can turn any ductile solid metal into thousands of varieties of meshes. The process of stretching and slitting gives the diamond mesh effect. This can vary in diamond size as well as thickness and type of material used. This resulys in a strong, verstile and attractive product.

Why Dimond Mesh?
Indomesh Diamond Mesh offer great open area without any compromise in strength. Visually our Diamond Mesh offers an alternative to other types of mesh such as welded wire mesh. With exclusive design and serrated open diamond pattern and angular shape, it has maximum orignal metal tensile strength and the load deflection do not exceed the 10 mm limit as per BS 45392, Part lll.

Features & Benefits of Diamond-shaped Expanded Metal Gratings (Mesh)
The Expanded Mesh is formed from a single piece of metal which means there is nothing to work loose, cracks, or strained joints or welds. The strength of the mesh makes it valuable for use in multiple applications. In this process, there is no wastage, which means up to 60% cost savings in steel and other materials, especially compared to other metal processing methods.

Higher-strength to weight ratio than sheet metal - hard
to believe but tested and true.
By expanding metal from its solid sheet form, additional strength is added. The uncut knuckles of expanded mesh withstand stress better than welds or joins due to its typical angular shape.

Expanded Metal Unwelded Gratings is a substitute for conventional Bar Gratings and Chequered Plates. Being lightweight and economical, it is ideal for use wherever a strong, durable, lightweight and skid-proof surface is needed to ensure complete safety and sure-footing.

Ideal Applications
Whatever is your Industrial Flooring Application, our Gratings are extensively used for making High Tension Tower & Oil Rig Walkways, Boilers and Industrial Machinery Platforms, Chemical Industries Platforms & Walkways, Bridges, Staircases, Racks, Partitions, Industrial and Housing/Plot Fencing... even Designer Furniture Systems for Interiors.

Terminology

Bond

The solid intersection of two strands

SWD

Nominal dimension, Short Way of Diamond

LWD

Nominal dimension, Long Way of Diamond

Design Size

Actual dimension SWD and LWD. Measured form a point to a corresponding point on the adjacent diamond

SWO

Short Way of Opening

LWO

Long Way of Opening

Strands

The sides of the expanded metal design

Strand Thickness

Thickness of the base metal

Strand Width

Amount of material fed under dies to produce one strand

Diamonds

Open area of metal after expanding

Edge Configuration

Condition of edge of an expanded metal sheet. Usually refers to "open" (random) or "closed" (bonded) diamond edges produced from shearing

Flattened

(abbreviated F) Expanded metal that has been cold-rolled after expansion to provide a smooth, flat and level sheet. The flattening process reduces the original thickness of the base metal

Grating

Expanded metal that is produced from heavier plate, usually low-carbon steel, with larger diamonds. It is typically used for walkways and platforms

Machine Run

Stock size pieces as manufactured (without being sheared to size)

Meshes

A term used to describe special expanded metal products

Shearing

Cutting expanded metal to produce various sizes and shapes (The standard is "random shearing". If the buyer desires "bond shearing" that must be specified at order entry)

Standard

(abbreviated S) (Same as "Regular" or "Raised") Expanded metal as it comes from the press. The strands and bonds are set at a uniform angle to the plane of the sheet. This gives added strength and rigidity, as well as skid-resistant surface

Style Designation Format

A combination of numbers, letters and abbreviations in a standard format permitting proper specification of dimension, thickness, style and weight of most commonly used expanded metal products (e.g. 3/4 #9, or 4.0 lb.)

TOLERANCES

Stock Size or Machine Run Sheets:

SWD

Shall not vary greater than -0" +1/4" per foot of width (i.e. 48" could be 49")

LWD

Shall not vary greater than -0" + 1/4" per foot of length (i.e. 96" could be 98")

Random Sheared

Expanded metal +/- 1/8" (open diamonds 4 sides)
Grating +/- 1/4"
Mini Mesh +/- 1/16"

Bond Sheared

(LWD) +/- 1/2 of the width of the diamond (LW)
(SWD) +/- 1/2 of the width of the diamond (SW)

Mini Mesh

(LWD) +/- 1/8"
(SWD) - 0 + 3/8"

Please note:
Bond Shearing is ONLY available in Flattened Expanded Metal and may not be available in all products. We can, however, make custom dies for your application