Types of Reinforcement Mesh

Reinforcement mesh, also known as reinforcing steel or rebar mesh, plays a crucial role in concrete construction. It enhances the structural integrity, tensile strength, and durability of concrete elements. There are several types of reinforcement mesh, each designed to meet specific construction needs. This guide provides an overview of the different types of reinforcement mesh and their applications.

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1. Welded Wire Mesh

Welded wire mesh is made by welding steel wires at intersections to form a grid pattern. This type of mesh is commonly used in concrete slabs, walls, and pavements due to its uniformity and strength. It is available in various sizes and gauges, allowing for flexibility in different construction projects.

2. Expanded Metal Mesh

Expanded metal mesh is created by cutting and stretching a sheet of metal to form a diamond-shaped pattern. This type of mesh provides excellent tensile strength and is often used in reinforcing concrete surfaces and structures that require additional support. Its open design also allows for better bonding with concrete.

3. Square Mesh

Square mesh, also known as welded square mesh, consists of equally spaced longitudinal and transverse wires welded at intersections to form square openings. This type of mesh is commonly used in floor slabs, roadways, and precast concrete elements. The uniform spacing of the wires ensures even distribution of loads and enhances the structural integrity of the concrete.

Square Reinforcement Mesh

4. Rectangular Mesh

Rectangular mesh is similar to square mesh but with rectangular openings. It is typically used in applications where different load distribution is required, such as in walls and beams. The rectangular pattern provides flexibility in reinforcing concrete elements with varying dimensions.

Rectangular Reinforcement Steel Mesh

5. Trench Mesh

Trench mesh is specifically designed for reinforcing concrete footings and trenches. It usually features longitudinal wires with larger diameters to handle the increased loads typical in footing applications. Trench mesh ensures the stability and durability of foundations and other ground-level structures.

6. Ribbed Mesh

Ribbed mesh, also known as deformed mesh, features ribs or deformations on the surface of the wires. These deformations improve the bonding between the mesh and the concrete, providing enhanced tensile strength and load-bearing capacity. Ribbed mesh is widely used in reinforced concrete slabs, beams, and columns.

7. Galvanized Mesh

Galvanized mesh is made from steel wires coated with zinc to prevent rust and corrosion. This type of mesh is ideal for applications exposed to moisture or harsh environmental conditions, such as marine structures, retaining walls, and exterior concrete elements. The galvanized coating ensures the longevity and durability of the reinforcement.

8. Stainless Steel Mesh

Stainless steel mesh is made from high-grade stainless steel wires, offering excellent resistance to corrosion and chemical damage. It is commonly used in environments where exposure to corrosive elements is a concern, such as in chemical plants, wastewater treatment facilities, and coastal constructions. Stainless steel mesh provides superior durability and strength.

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Questions and Answers

Q: What is the primary purpose of reinforcement mesh in concrete construction?

A: The primary purpose of reinforcement mesh is to enhance the tensile strength, durability, and structural integrity of concrete elements. It helps in distributing loads evenly and prevents cracking and deformation of the concrete.

Q: How do I choose the right type of reinforcement mesh for my project?

A: Choosing the right type of reinforcement mesh depends on the specific requirements of your project, such as load-bearing capacity, environmental conditions, and the dimensions of the concrete elements. Consider factors like tensile strength, corrosion resistance, and bonding capabilities when selecting the mesh.

Q: Can reinforcement mesh be used in all types of concrete structures?

A: Yes, reinforcement mesh can be used in various concrete structures, including slabs, walls, beams, columns, footings, and pavements. The type of mesh selected should be appropriate for the specific application to ensure optimal performance and durability.

Q: What are the benefits of using galvanized mesh in construction?

A: Galvanized mesh offers enhanced resistance to rust and corrosion, making it ideal for structures exposed to moisture and harsh environmental conditions. It ensures the longevity and durability of the reinforcement, reducing maintenance costs and extending the life of the concrete elements.

Q: Is stainless steel mesh more expensive than other types of reinforcement mesh?

A: Yes, stainless steel mesh is generally more expensive than other types of reinforcement mesh due to its superior corrosion resistance and strength. However, its durability and low maintenance requirements can offset the initial cost in the long run, especially in corrosive environments.

In conclusion, choosing the right type of reinforcement mesh is crucial for the success of your construction project. By understanding the different types of reinforcement mesh and their specific applications, you can ensure optimal performance, durability, and structural integrity of your concrete elements.

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I've gotten to the point where I need to buy mesh for my future pad. I'm shopping at Home Depot and they have two types. A roll that is 5' tall and 150' long for $105 and the panels that are 3'x7' for $7.20/each.

I'm going to need enough to cover my 18'x25' pad. This means 19 panels ($150 after tax) or I can use the roll, but have 40' left over or so and that would be $115.

Is one better than the other? Is it worth the extra $35 for the mesh panels to avoid the need to measure and cut the roll and then try to get it to lay flat so I can tie it down? I'm leaning to the panels even though it's more expensive per square foot.

Advice is greatly appreciated. Model A: I always have used REBAR or scrap steel on my sidewalks and most of the flat surfaces I've poured. I had a couple young kids to a pad for me 30 years ago with mesh though and even though my yard fell into my neighbor's house (his fault) 1/2 the pad sat suspended and held up and I think it was only 4 inches thick. if I recall correctly they used the roll and I probably would if I didn't have any rebar. I usually pick up rebar any time I see it laying around when i'm buying tools or STUFF so I usually have some. I need to use it on the new driveway i'm planning on pouring hopefully this year.

also if you do get rebar we use decent size rocks we find in the yard and toss in a bucket or the stores sell little plastic risers to keep it settling to the bottom.

good luck For anything more than a couple of sticks, rebar from a local steel supplier will be WAY cheaper than from HD. For a serious tomato cage project, I ordered a bunch of #3 rebar, had it delivered in 20' lengths and saved a bundle vs buying myself at HD.

As for a cutoff disc, yeah, you could do that, and it would work for a few cuts. I bought a set of HF's largest bolt cutters (42" IIRC) and modified them with a bracket so I could lay one handle on the ground and have it still stand up (to use it like a rebar cutter but much cheaper). They ran me around $35. I made a few thousand cuts, and they still look like new. I've also got a Portaband which is amazing on rebar, but the bolt cutters were cheaper than blades for this project. Depending on what usage the slab will be put to, but these days with quality concrete being less than it used to be, I too would opt for the rebar. Mesh is best for sidewalks and low stress usage. Mesh won't prevent cracking but only holds the pieces together when it does. The real secret is lots of steel and 6 bag mix or better. Once down concrete never gets better, only worse, and it's something you live with forever. When looking at ugly cracks, no one ever talks about the few bucks they saved, just about the bad results from trying to save a few bucks. Also, use a sealer to retard moisture loss during the curing process. Model A Fan I think your choice of wire mesh is a good one for a properly designed residential slab that doesn't see high loads and that has a properly compacted sub-grade. The wire mesh 6" square pattern is better than re-bar spacing of 18" or 24".

Opinions vary, and this is just my opinion based on my "good luck" on the 4 previous buildings I have had at 3 previous homes.

In regard to your Wire Mesh questions: stay away from the rolls, buy Wire Mesh Mats.

There's a lot of engineering that goes into concrete welded wire mesh. Here's a link fall that engineering: Standard Practice for Structural Welded Wire Reinforcement.. lot's of good data here: http://files.engineering.com/getfil...c=.1.&__hsfp=

The concrete wire mesh at Home Depot and your local lumber yard is typically 10 gauge, the thinnest wire mesh mat available.

8' x 20' concrete wire mesh mats are available from companies like HD WhiteCap (they have stores in Washington) in various gauges, such as 10, 6 and 4 gauge.

Here are some more links for you:

6 x 6-W2.9 x W2.9 6 ga 8' x 20' Wire Mesh Mat http://www.whitecap.com/shop/p/6-x-6-w29-6-ga-8-x-20-wire-mesh-mat-g820

6" x 6" W1.4 10 ga 8' x 20' Wire Mesh Mat http://www.whitecap.com/shop/p/6-x-6-w14-10-ga-8-x-20-wire-mesh-mat-g820

To support the wire mesh mats use concrete dobies. These are square pieces of concrete with a wire in them that allows you to tie it to the mesh.

Here's a link to various dobies: http://www.whitecap.com/shop/wc/search?searchTerm=dobie

And this is the size I used. I picked them up at the local HD Whitecap for 0.28 cents a piece: http://www.whitecap.com/shop/p/dayton-superior-cwd-2-dobie-with-wire-

I'd caution you on the use of bricks. Ideally you want a product that the concrete will adhere to, and that wouldn't degrade over time and leave a void. Nothing is better than concrete for this application.

If you use 6 gauge concrete wire mesh, on concrete dobies spaced on 24" centers, it is a stiff enough assembly such that it stays where you want it.

Hope this helps. Good luck with your project.

As a side note:

I would recommend against the use cattle panels that Evilunclegrimace recommended above. Most of these panels have a non-uniform panel layout which creates non-uniform stresses in the concrete. Concrete wire mesh is made from high tensile strength steel specifically manufactured, welded and tested for it's intended purpose. Cattle panels are made for, well, cattle.​