How do they make screen wire?

Construction material

A building worker is spraying shotcrete on welded wire mesh

Welded wire mesh, or welded wire fabric, or "weldmesh" is an electric fusion welded prefabricated joined grid consisting of a series of parallel longitudinal wires with accurate spacing welded to cross wires at the required spacing.

Machines are used to produce the mesh with precise dimensional control. The product can result in considerable savings in time, labour and money.

Uses of welded wire mesh

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The welded wire mesh is a metal wire screen that is made up of low carbon steel wire or stainless steel wire. It is available in various sizes and shapes. It is widely used in agricultural, industrial, transportation, horticultural and food procuring sectors. It is also used in mines, gardening, machine protection and other decorations.

Weld mesh is the term given to the kind of barrier fencing that is manufactured in square, rectangular or rhombus mesh from steel wire, welded at each intersection.

Welded wire fabric (WWF) is also sometimes used in reinforced concrete, notably for slabs.

Types of welded wire mesh

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There are several types of welded wire mesh which can be categorized according to their structure, use, and characteristics.

Welded wire fabric (WWF) for concrete slab reinforcement

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This type of mesh is a square grid of uniformly placed wires, welded at all intersections, and meeting the requirements of ASTM A185 and A497 or other standards.[1] The sizes are specified by combining the spacing, in inches or mm, and the wire cross section area in hundredths of square inches or mm2. The common sizes are in the following table:

Imperial Size Metric Equivalent Weight Imperial Weight Metric 6x6 W1.4/W1.4 152x152 MW9.1/MW9.1 20 lb/100 sf 0.98 kg/m2 6x6 W2.1/W2.1 152x152 MW13.1/MW13.1 30 lb/100 sf 1.47 kg/m2 6x6 W2.9/W2.9 152x152 MW18.7/MW18.7 41 lb/100 sf 1.99 kg/m2 6x6 W4.0/W4.0 152x152 MW25.8/MW25.8 56 lb/100 sf 2.73 kg/m2 6x6 W5.4/W5.4 152x152 MW34.9/MW34.9 76 lb/100 sf 3.72 kg/m2 4x4 W1.4/W1.4 102x102 MW9.1/MW9.1 30 lb/100 sf 1.46 kg/m2 4x4 W2.1/W2.1 102x102 MW13.3/MW13.3 43 lb/100 sf 2.40 kg/m2 4x4 W2.9/W2.9 102x102 MW18.7/MW18.7 61 lb/100 sf 2.96 kg/m2 4x4 W4.0/W4.0 102x102 MW25.8/MW25.8 83 lb/100 sf 4.06 kg/m2 4x4 W5.4/W5.4 102x102 MW34.9/MW34.9 119 lb/100 sf 5.82 kg/m2

Electro galvanized welded wire mesh with square opening

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This type of welded wire mesh is designed for building fencing and in other infrastructural purposes. It is a corrosion resistant wire mesh that is largely used in structural building. It is also available in different forms like rolls and panels for industrial uses.

Hot dipped galvanized welded mesh

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This type of mesh wire is generally made up of plain steel wire. At the time of processing it goes through a hot zinc covering process. This type of welded mesh ware with square opening is ideal for animal cage structuring, fabricating the wire boxes, grilling, partition making, grating purposes and machine protection fencing.

PVC coated welded mesh

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PVC coated welded mesh with plastic covering is constructed with galvanized iron wire of high quality. It has PVC powder covering that is processed by an automatic machine. The smooth plastic coating on this corrosion protective wire is attached with a strong adhesive which make increases durability of the wire. It is used in fencing residential and official properties like gardens, parks, building etc. The PVC coated welded mesh which is available as both rolls and panels, is also available in different colors like white, black, green etc.

Welded stainless steel mesh

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This kind of welded mesh wire is basically used in industrial fencing purposes. It is made up of stainless steel that has high strength and integrity. This corrosion resistance meshed wire is long lasting and is widely used in transportation, agricultural, mining, horticulture, entertainment and other service sectors.

Welded wire fencing

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This is a type of meshed wire that is available in rolls or panel for used for fencing. Also referred to as "weldmesh", it is available with or without galvanization. The non-galvanized version comes for a lower cost.

Welded steel bar gratings

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This type of welded mesh wire provides advantages like high strength, easy installation and feasible cost. It is mostly used for grating roads, making drainage coverings and building safety walls. It also has uses in chemical plantation, platform grating, metallurgy etc.

References

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1. ^

   Frederic S. Merritt, M. Kent Loftin, Jonathan T. Ricketts, Standard Handbook for Civil Engineers, Fourth Edition, McGraw-Hill Book Company, 1995, Page 8.17

What is Wire Mesh?

Wire mesh is a common type of metal screen consisting of parallel rows and intersecting columns of wire. Although similar in appearance and their applications, perforated metal sheet and expanded metal sheet are not types of wire mesh. Wire mesh comes in an almost limitless amount of shapes and sizes, and a large variety of materials and metal alloys.

How is Wire Mesh Made?

The intersecting wires are typically joined together by welding or weaving – two of the more common forms of wire mesh. The solid wire used is usually made by progressively drawing down a metal in a series of round dies until the desired diameter has been achieved.

There are two common types of mesh:

1. Welded Wire Mesh
2. Woven Wire Mesh

Welded Wire Mesh

Welded wire mesh has intersecting rows and columns of parallel wires that are welded together at the intersection. Once the wire has been drawn down to the desired size, it is fed into a machine which welds the multiple rows of wire together at their intersection.

As the mesh is fed through the machine, a parallel line of welds is created simultaneously where the perpendicular lines meet. The next intersection of wires is then fed through the machine to be welded, and this process continues, joining each row of wires together. This machine typically welds the wires using electrical resistance as the source of heat. Although other welding methods could be employed, this is the usually most economical. Once the mesh has reached the desired length, it is cut by a shear, resulting in a sheet of flat and rigid welded wire mesh.

Woven Wire Mesh

Woven wire mesh has an array of intersecting wires, similar to a woven cloth. Typically, the wires are woven over and under the perpendicular wires producing a stable sheet. This pattern is known as a “Plain Weave Mesh”. For applications that require a more flexible sheet, a “Twill Weave” can be used.

This involves wire that is woven over 2 perpendicular wires, then under the next set of 2 perpendicular wires, and so on. Woven wire mesh has no welds on them. Instead, they are fed into a machine similar to a loom which feeds a straight wire through chosen weave pattern. The wires are then bent to the reverse position, and the next straight wire is fed through the pattern. The machine continues this process until the desired dimensions are reached and the completed wire mesh sheet is then cut to the desired size.

Applications

Welded wire mesh and woven wire mesh are used in many different fields. Several uses include:

• Fences
• Sifters
• Grills
• Machine and equipment safety barricades
• Concrete reinforcement
• Shelves
• Cages