Stainless Steel Welded Wire Mesh

Welded Wire Mesh – Advantages and Applications

Welded wire mesh is a reinforcement which is based on steel in concrete. This welded wire mesh is used to replace the cut & bend placed their bars. This kind of bars is thermo mechanically treated. These are made of wire.

These welded wire mesh are located in two perpendicular directions. It also connects in resistance spot welding. Welded wire mesh is also known as welded wire fabric. Welded wire mesh is grid of stainless stell wires. Welded wire mesh is good for various applications.

Welded wire mesh can be in shape of rolls or flat panels. The wire of welded mesh is parallel longitudinal. I country like India welded wire mesh in very popular right now. There is various type of welded wire mesh.

Diameter of welded wire mesh

Welded wire mesh has different type of diameter. Users can choose the perfect diameter of welded wire mesh for them. To buy right diameter of welded wire mesh you have to use decimal format instead of gauge format.

Usage

Welded wire mesh is used in agriculture, horticulture, transportation, mining and construction. Standard back gain of welded wire mesh is very common in short space welded wire mesh.

Advantage of welded wire mesh

Welded wire is made of low carbon. This has some advantages. These are mentioned below.

1. Site efficiency is improved by using this.
2. Welded wire mesh also increases productivity.
3. By using welded wire mesh construction site does not depend upon human power that much.
4. Inappropriate bending of bars is drastically reduced because bending machines bend the mat.
5. Welded wire mesh also gives the perfect reinforcement size.
6. Welded wire mesh is easy to place in particular position than any other bars.
7. Cost of slab is very affordable cause of welded wire mesh.
8. By using welded wire mesh construction cost reduces drastically.
9. Welded wire mesh also increases construction speed.
10. By using welded wire mesh professionals can make more thin bars.
11. By using welded wire mesh users can also create things with smaller crack. Crack size can be small than previous time if professionals use welded wire mesh.

12. Welded wire mesh can be created from rolls. It does not manufacture from stock length bars. In results huge amount of wastage is not possible here.
13. Welded wire mesh does not require huge space in working site.
14. Cutting and bending process cancel to rebar yard at site.
15. Placing time is way faster than others.
16. Welded wire mesh also removes replacement of reinforcement.
17. Welded wire mesh is very easy to use and install.

Applicability of welded wire mesh

1. Welded wire mesh is used to Reinforce the structure of concrete. Welded wire mesh is laid under the slabs, so it increases strength of concrete structure.
2. Welded wire mesh is also used to make frames.

3. Welded wire mesh is also used to reinforce road surfaces and parking areas so it is called as road reinforcing mesh grid.
4. Welded wire mesh also makes various fences.
5. Welded wire mesh is also used as Masonry mesh.
6. Welded wire mesh is also used as coal mine.
7. Welded wire mesh is also used to support coal mine roadway.
8. Welded wire mesh is used to increase productivity.
9. Welded wire mesh is also used for reducing downtime.

Procedure of testing

To keep consistency in welded wire mesh User should obey the stringent internal standard. There is different type of testing is available for welded wire mesh. Torque test and weld set down mesh are used in production process.

Edging of welded wire mesh

There are two type of edging available in welded wire mesh. One is trimmed welded mesh and the other one is untrimmed welded mesh. Proper space is needed around the trimmed mesh. For staying in specific dimensions, the perimeter can be balanced. Outer wire can be equal in space od welded mesh in untrimmed edges. In welded wire mesh tail length can be customized.

Conclusion

In this article we have discussed about welded wire mesh, diameter of welded mesh, usage and advantages of welded wire mesh, applicability and procedure of testing.

If viewers find this article informative and useful please give feedback below this article and let us know about your opinion.

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Importance of structural wire mesh in precast construction

By David Metcalfe

Accelerated precast construction of culverts and small bridges is the use of innovative scheduling, delivery, design, manufacturing and construction methods to reduce on-site construction time and costs, while improving safety and reducing impacts on road users.

The growing specification of accelerated precast construction (APC) in Canada by transportation planners and designers focuses on identifying efficient ways to build transportation-related structures in a time of increased public demand for infrastructure rehabilitation, expansion and replacement, along with the ongoing demand for skilled labour. The inclusion of engineered structural mesh in precast concrete structural design may provide immediate relief to limited municipal and provincial infrastructure budgets, while contributing to the resiliency of modern highway systems.

Precast reinforced concrete boxes, arches and other three-sided spans are used not only for culverts and small bridges, but also for drainage and retention/detention components of stormwater management plans. Box and pipe culverts are in fact underground bridge structures. Simultaneous construction activity is possible using precast boxes and slabs for bridge deck applications. More than one structure on a project can be assembled at the same time, thereby speeding up project delivery.

This lowers costs for local communities in several ways. Reduced project delivery time minimizes traffic delays, community disruption, and the land required for rights of way, temporary alignments and utility relocation. Shortened installation time reduces impacts on the environment and the possibility of weather-related delays.

Accelerating the repetitive production of standard precast products with engineered structural wire mesh rather than with rebar contributes significantly to reduced project delivery time. Precast elements can be delivered to construction sites within schedules for stock piling or for just-in-time delivery.

Structural welded wire reinforcement (WWR) offers several other benefits over the use of traditional rebar:

• WWR is made from higher yield strength steel, up to 550 MPa (80 Ksi) compared to regular 400 MPa (60 Ksi) rebar.
• Steel content of a precast structure could be reduced by as much as 27%.
• WWR is easier and faster to install, with reduced set-up time and smaller crews than for individual rebar placing and hand tying. Savings can be as much as 50% – 80%.
• Smaller wire mats (more closely welded together and equally spaced) result in improved crack control in precast products.
• WWR ensures proper positioning in mold forms with the added benefit of hassle-free inspections.
• WWR can be bent and rolled to fit a wide range of precast and poured-in-place structures, including pipe and boxes.
• Construction with mesh-reinforced products can be as much as 20% faster than projects that specify standard rebar reinforcement.
• Using welded wire reinforcement makes the placing or assembly processes easier and thereby contributes to a safer workplace. There is a decrease in the risk of work-related accidents.
• Deformed and welded bars create a solid anchor in concrete and there is no reinforcement shifting while concrete is being poured.
• WWR mats are generally available in widths up to 10 feet and lengths up to 39 feet.

Much investment has been made into the technology of precast boxes for culverts in recent years. Not too long ago, the largest precast box was 3.75 m x 3.75 m. Some customers needed larger structures to accelerate construction schedules. Precasters responded with concrete boxes that are 6.25 m wide and 4.4 m high. Engineered structural wire mesh can accelerate installation time because less steel area is required for the same resistance. Full compliance with standards and codes is assured during installation.

The health and safety of the travelling public is of paramount interest to all involved in the construction of highway infrastructure. The speed of accelerated precast construction, facilitated by precast concrete elements produced with engineered structural wire mesh, not only ensures safe transportation systems, but ones that are resilient to natural and man-made disasters.

Changing weather patterns are affecting the hydraulics of critical infrastructure systems, such as storm sewers, culverts and small bridges in many urban areas.

Do Concrete Slabs Really Need Welded Wire Mesh?

The past decade has seen many production builders switch to synthetic fiber mesh reinforcement for concrete slabs to help reduce surface cracking. In the process, many of these builders have completely eliminated traditional welded wire mesh (WWM).

But while fiber mesh has advantages, it also comes with potentially costly drawbacks.

That may sound surprising, given that fiber’s big appeal is its time and money savings. By using it, builders don’t have to pay a premium for concrete wire mesh, and concrete contractors don’t have to take the time to correctly install it; in fact, some concrete contractors offer a price break for fiber mesh.

The Problem of Ugly Cracks in Concrete Slabs

While fiber does reduce surface cracking, it won’t eliminate cracks completely. Worse, when a crack does develop, the lack of WWM can be a real weakness.

That’s because properly installed WWM will keep the concrete on both sides of a crack from separating further and will keep them on the same plane—that is, prevent differential settling. Fiber mesh won’t.

Repairs to differential settling don’t leave the greatest impression on homebuyers. You have to grind down the surface on either side of the crack, fill the gap with epoxy and try to smooth it all out (see below). Even when done well, this leaves a visible scar.

Differential settling on either side of a crack requires an unsightly repair, which not only costs money but also can leave a bad impression with customers. | Photo: courtesy IBACOS

While such scars are mostly cosmetic, they scream “poor workmanship” to customers, leading many to doubt the structural integrity of the home’s slab, at least. And of course, the builder has to pay for the repair.

As use of fiber mesh use has grown, we’ve seen more and more of these problems on job sites ... but we’re also seeing more builders take notice. Soon after switching to fiber mesh, one of our clients found a dozen cracking and settling slabs at any given time. They reintroduced WWM and the problems virtually disappeared.

Settling Slabs and Underlying Soil Specs

The chance of differential settling depends largely on the underlying soil. Where the soil is sandy and stable, as in much of Florida, settling is less likely and fiber alone can be a reasonable choice.

However, in areas with clay and other expansive soils, such as the Carolinas, correcting problems caused by the elimination of WWM can cost more in the long run than the initial cost savings associated with fiber mesh.

Concrete Wire Mesh Helps Minimize Concrete Slab Cracking and Settling

In fact, the best way to minimize the chance of cracking and settling is to use fiber mesh and WWM in the same slab.

Like any structural product, WWM won’t do its job unless it’s installed correctly. Unfortunately, that’s not always the case.

Proper installation that provides maximum strength requires the mesh to be raised off the ground so that when the concrete sets, it’s in the lower third of the slab depth. That means placing the wire on chairs to hold it at the correct height (see below).

It’s crucial to ensure that welded wire mesh be placed on chairs of the proper height. Otherwise, the mesh won’t effectively hold the slab together. | Photos: courtesy IBACOS

Wire that’s not placed on chairs will not be effective, but in the rush to get jobs done, some crews eliminate the chairs and roll the wire directly out over the plastic sheeting that covers the dirt. And when installers do use chairs, they must take care not to knock the wire off the chairs during the pour. If they do, then they need to reset the concrete wire mesh.

Making sure all of this gets done right can be a training and quality assurance challenge for the builder, and avoiding that challenge may be one reason why so many opt for synthetic fiber for these applications.

But in soils that make settling likely, this type of oversight really needs to be a priority. 

Richard Baker drives quality and performance in homebuilding as the building performance manager on the PERFORM Builder Solutions team at IBACOS.