Aperture width w is the distance between two adjacent warp or weft wires, measured in the projected plane at the mid-positions.
Wire diameter d is the diameter of the wire in the woven cloth. (The wire diameter may be altered slightly during the weaving process.)
Pitch p is the distance between the middle point of two adjacent wires or the sum of the aperture width w and the wire diameter d.
Warp: All wires running lengthwise of the cloth as woven.
Weft: All wires running across the cloth as woven.
The number of apertures per unit length, n is the number of apertures which are counted in a row one behind the other for a given unit length. The unit length may be 1 cm, 1 dm, Inch or any other unit of length. (The number of apertures with a length of 25.4 mm is designated as "Mesh")
Mesh = number of apertures per English inch = 25.4 : p
n/cm = number of apertures per cm = 10 : p
n/cm² = number of apertures per cm² = (10 : p)²
Open screening area, Ao: The percentage of the area of all the apertures in the total screening surface or the ratio of square of the nominal aperture width w and the square of the nominal pitch (= w+d), rounded to a full percentage value:
Ao = 100 (w : p)²
Type of weave is the way in which the warp and weft wires cross each other.
Weight G of the steel wire cloth screen section in kg per m²
The actual value can be up to 3 % lower. The wire diameter can be calculated using the following equation:
Material: It is up to the user to specify the choice of material with respect to:
a) the final application of the wire cloth (e.g. resistance to environmental corrosion, suitability for food products etc.)
b) the further processing (e.g. suitability for shaping, welding and surface treatment).
Materials should be designated in accordance with appropriate standards, or if none exists, according to commercial specifications.