Wire Fabric Reinforcement Spec

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Hello,

I am in water pipeline sector. We will perform Cement Mortar Lining.

What’s the meaning of 2 × 4 W0.5 × W0.5 according to the AWWA C205-89? I think 2 inc means “distance of between each square”. I really do not understand 4 W0.5 and W0,5. Kindly help me please.


AWWA C205-89:
2.1.2 Wire-fabric reinforcement for pipe coating a n d for lining of specials. Reinforcement shall be 2 × 4 W0.5 × W0.5 welded wire fabric. The wire shall con- form to the requirements of ASTM A185 or ASTM A497. Unless otherwise specified by the purchaser, wire-fabric reinforcement may be either crimped or uncrimped.

 

[dik]

"What's happened to the good old designations for wire mesh, such as 4X4 10X10? I used to be able to understand this 4 inches by 4 inches, 10 gage by 10 gage. Now I keep bumping into fancy numbers like 4X4 W1.4XW1.4. Why make everything so complicated?
The new designation of wire mesh does seem more complicated than the old. The "W1.4XW1.4" means the same thing as "10 gage by 10 gage" but the number "1.4" designates the cross-sectional area of the wire in hundredths of a square inch. In other words, the 1.4 equals 0.014 square inch. This is very handy information for the designer because it saves his having to look up the crosssectional area in a table. The "W" indicates plain wire. For deformed wire the "W" is replaced with a "D"."

https://www.concreteconstruction.net/how-to/decoding-welded-wire-fabric-designations_o

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So strange to see the singularity approaching while the entire planet is rapidly turning into a hellscape. -John Coates

-Dik

 

[BridgeSmith]

I keep bumping into fancy numbers like 4X4 W1.4XW1.4. Why make everything so complicated?

I think you answered your own question:

The "W" indicates plain wire. For deformed wire the "W" is replaced with a "D".

If you're referring to the numbers designating hundredths of a square inch instead of gauge, it was probably done so that all sizes, including the large sizes, like the 1/2" (D20) and 5/8" (D31) wires could designated using the same notation.