Welded wire fabric sizes are some of the things that I do not comprehend well given the numbering system that is being used.  I notice the 6×6 and the 4×4, which I understand should represent the horizontal and vertical spacing of the fabric.  However, I have no idea what the W or D stands for; neither do I understand the numbers that are associated with the letters.  There must be a method of understanding this numbering system, and it would be helpful to fully comprehend them now.


The History Of The Welded Wire Fabric Sizes

It was in 1970 that the wire fabric sizes have changed.  The American Society for Testing and Materials shifted from the gage system to a numbering system that would mainly simplify the process of using wire fabrics.  It was a more rational numbering system that relates to the cross-sectional area of the wire using a letter-and-number combination.  This makes it easier for the designer to measure the welded wire fabric, as it refers to the cross-sectional area, which is being presented in the hundredths of a square inch.  The new numbering system became useful in recognizing the steel area through the spaces presented in the longitudinal and transverse wires.


The Process Of Determining The Fabric Size

In the wire fabric sizes, certain letters and numbers are being used to define the type of material and the area designated with it.  W stands for smooth wire; D stands for deformed wire; while MW stands for metric W number.  The number that follows these letters refers to the cross-sectional area of the wire presented in hundredths of a square inch.  In the case of 6×8-W8.0xW4.0, the 6 refers to the spacing in inches of the longitudinal wires while 8 refers to the spacing of the transverse wires.  W8.0 stands for the type and size of the longitudinal wire while W4.0 stands for the type and size of the transverse wire.  With this, the size of welded wire fabric can be calculated by identifying the steel cross-sectional area and then converting it in hundredths of a square inch.


The Welded Wire Fabric Sizes

There are a number of sizes that are available for welded wire fabrics.  A total of about 32 different sizes are available for these, wherein 2×2 fabric contain 7 different sizes; 3×3 contain 4 different sizes; 4×4 contain 8 different sizes; 6×6 contain 12 different sizes; and 12×12 contain 1 size.  Each size comes in different types of wire and different sizes that go along with it.  There are countless wire fabric sizes that are available, which make it convenient not just for designers but for other purchasers as well.


The Need For Additional Overhangs

Welded Wire FenceThere are end overhangs that are needed to ensure that there is enough space in cutting and distributing the welded wire fabrics.  End overhangs are one-half of the transverse spacing.  Thus, a 6×6 wire fabric should have at least a 3-inch overhang on each of its ends.  The length of the wire fabric is then rolled from tip to tip, which then includes the end overhangs.  Indeed, the welded wire fabric sizes are easy to understand, as it is even more comprehensible than the old gage system that was used decades ago.