What mesh to use for slab?

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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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For more Slab Reinforcing Meshinformation, please contact us. We will provide professional answers.

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

Welded wire mesh was once the go-to material for forming concrete slabs and reinforcements, but some builders have recently opted for the fiber variety. Though developers may cut costs by opting for synthetic mesh, there are a few things to consider before making the switch.

Read on to learn about the potential drawbacks of fiber cloth and why traditional welded steel mesh may be the best choice.

What to Consider Before Using Fiber Mesh

One of the main reasons mesh is used for concrete slabs is to prevent surface cracking. Though fiber cuts down on the number of breaks, it doesn't eliminate them entirely. Not only that, but when cracks appear, fiber mesh often lacks the strength to stop them from spreading.

So, while synthetic mesh may be more affordable upfront, builders could end up paying more for repairs down the road. Homebuyers and commercial real estate investors are often on the lookout for flaws, and cracks on a new build can stick out like a sore thumb.

Another thing to consider is that fiber mesh doesn't do as good a job preventing differential settlement. Seeing as a level foundation is vital, and fixing it isn't always a simple process, this is a major concern.

Welded Wire Mesh for Concrete Reinforcing

Created by heating intersecting metal wires with an electric current, welded wire mesh boasts impressive rigidity. It's also resistant to abrasion, rust, corrosion, and extreme temperatures.

These characteristics make welded stainless steel cloth ideal for concrete reinforcing, a process that relies on exceptional strength and inflexibility. The durable alloy also helps ensure foundational evenness.

Do Concrete Slabs Really Need Welded Wire Mesh?

There's no one-size-fits-all way to construct houses and buildings. The choice of materials often depends on various factors, like availability, budgeting, and whether substantial settling is common in the area.

All that said, welded reinforcement concrete mesh remains the gold standard for construction. The heavy-duty product is incredibly sturdy, resilient, long-lasting, and versatile.

Minor cracks and slight foundational settling are often to be expected, even with new builds. Still, too many imperfections can signify poor workmanship and lead to prospective buyers feeling dubious about the structural integrity.

Ensuring Crack-Free Concrete

Choosing welded metal mesh over fiber is the best defense against cracks in concrete slabs. However, as with all structural projects, the material can't do its job if it's not installed correctly. Proper installation ensures the maximum level of strength is applied, which keeps breaks at a minimum.

For more insight into this topic, see our Guide to Wire Mesh for Construction & Building.

Metal Wire Mesh Products for Construction & Building

As one of the top wire mesh suppliers in the world, TWP Inc. is a premier resource for critical construction and building materials. When you shop our inventory, you'll find T-304 and T-316 welded stainless steel mesh with various gauges, opening sizes, and mesh counts.

We also offer expert in-house services, including laser cutting, disc stamping and sizing, roll slitting, and ultrasonic cleaning. If you don't see the specification you're looking for, we're happy to accommodate custom orders. Request a free quote to get started!

For more news and insight into how metal cloth is used in your industry, connect with TWP Inc. on LinkedIn.

The company is the world’s best Coal Mine Support Mesh supplier. We are your one-stop shop for all needs. Our staff are highly-specialized and will help you find the product you need.