Woven Wire Mesh and Wire Cloth Formulas

Formula to Determine Mesh Count

If opening and wire diameter are known, add both and divide the sum into 1.

1 Mesh =       (D + O)

D = Wire Diameter O = Opening

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Open Area of Rectangular Woven Mesh

Formula

The percentage of rectangular wire mesh (also referred to as off count mesh) open area may be determined by the following equation .

% OPEN AREA = (1-ND) (1-nd) x 100 N = Wires Per Inch in Warp n = Wires Per Inch in Shute D = Diameter of Warp Wire d = Diameter of Shute Wire

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Open Area of Square Woven Mesh

Formula

The percentage of open area for regular square woven mesh having the same wire diameter in both directions (warp and weft) may be determined by the following equation.

2     Percent Open Area   =    1-   (Mesh Count x Wire Diameter)     X 100

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Space Cloth Open Area

Formula

The percentage of space cloth open area may be determined by the following equation

Opening   2     Percent Open Area =       X 100     Opening + Diameter

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Wire Cloth Opening (Aperture)

Formula

To determine a wire cloth opening, divide the mesh count into 1, and subtract the wire diameter.

Opening  =   1 M    - D

M = Mesh Count

D = Wire Diameter

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Slotted Screen Open Area

Formula

The percentage of slotted screen open area may be determined by the following equation

W =    Width of Slot Opening L =    Length of Sloth Opening C =    Length of Cluster Opening D =    Warp Wire Diameter d =    Shoot Wire Diameter A =    Percent of Open Area ( W x L + 2W x C ) (W + D) (W + D)  A = x 100   ( L + d + 2( W + d ) )

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