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Welded Wire Mesh Fy

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Welded Wire Mesh Fy

Welded Wire Mesh Fy

Stenbrook

(Structural)

(OP)

25 Jun 18 19:34

I have always acted under the assumption that welded wire mesh was the same strength as rebar (60ksi). It came up recently that welded wire mesh also comes in higher strengths. My question is, what is the most common strength used for welded wire mesh and is it cost effective to go with the higher strength mesh. For reference, I am using a W2.9 x W2.9 4x4 mesh.

RE: Welded Wire Mesh Fy

WARose

(Structural)

25 Jun 18 19:59

See:

It depends on the size (and if it's deformed). But for most wire meshes the range will be from about 56 to 70 ksi.See: http://wri.support/WWR_500-R-16_Final.pdf

RE: Welded Wire Mesh Fy

BAretired

(Structural)

Further reading:
Choosing Between Plastic Mesh and Metal Wire Mesh
How to Choose cattle fence exporter?
Discover the Essential Key Questions to Ask When Ordering L Corner Bead for Your Home Improvement Project

Goto Sunshine Fencing to know more.

25 Jun 18 19:59 http://www.webcivil.com/usfrmwwf.aspx

BA

RE: Welded Wire Mesh Fy

hokie66

(Structural)

25 Jun 18 20:30

Strength is only part of the decision. No matter the yield strength, the elongation under force will be the same. And wire is not as ductile as bars. So a lot depends on the function of the reinforcement.

RE: Welded Wire Mesh Fy

Stenbrook

(Structural)

(OP)

25 Jun 18 20:40

Reinforcement is being used in a thin concrete shell (2 1/2") thick. We want to know if a higher grade steel is more cost effective then using a tighter spaced welded wire mesh. Or if it is even common to order a higher strength mesh.

RE: Welded Wire Mesh Fy

hokie66

(Structural)

25 Jun 18 21:00

I see no benefit in the higher yield strength fabric for a thin shell.

Do you mind sharing some more information about your shell?

RE: Welded Wire Mesh Fy

Stenbrook

(Structural)

(OP)

26 Jun 18 14:40

It is sort of a unique design situation where we are using a composite light gauge-concrete panel. Essentially, there are metal studs built compositely with a 2 1/2" concrete shell. This shell is being treated as "sheathing" essentially resisting the load in-plane and spanning from stud to stud. The complicated part in this is that we are using 200 mph wind pressure (ASCE 7-5) to design these panels. In some of the panels we have called for two layers of welded wire mesh which theoretically will fit into the panel, but you have to install it in a specific way in which the layers are overlapping each other. The contractor/owner is having issues with this so wants to utilize carbon fiber reinforced concrete to reduce the amount of strength needed from the welded wire mesh to reduce the layers of mesh down to 1 layer. The engineer they have are using to analyze the carbon fiber concrete with the mesh has indicated to us that the strength between 60 ksi and 75 ksi plays a significant impact on the dosage of the fibers. So hence why I am here, because I wasn't really sure if 75 ksi welded wire mesh was all too common or if it would be cost effective.

RE: Welded Wire Mesh Fy

TehMightyEngineer

(Structural)

26 Jun 18 15:37

All of the WWR we order is 70 ksi, and 80 ksi can be had for a reasonably small premium. As small as 2" spacing on wire mesh is common in precast. Reach out to a WWR supplier (we use CRI) and work with them to get an idea of what is a feasible stock wire size/spacing/grade and what would be difficult for them to do. For example, deformed wire diameters greater than 0.558" need to be custom made to order by our supplier and thus we avoid them.

Ian Riley, PE, SE
Professional Engineer (ME, NH, MA) Structural Engineer (IL)
American Concrete Industries https://www.facebook.com/AmericanConcrete/

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News

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:

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:

And this is the size I used. I picked them up at the local HD Whitecap for 0.28 cents a piece:

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.&#;

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: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:

For more Welded Wire Mesh Supplier information, please contact us. We will provide professional answers.