# Calculation tools

## Tools to calculate weights and open profiles

### Weight of perforated plates / BL

$Gkg\left(netto\right)=FaktorG×Lm×Bm×Dmm×\left(1-{A}_{0}%\right)$

D = material thickness
L = length
B = width
A0 = Open screen surface
G = weight

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Round holes, staggered / RV

W = width
T = spacing
S1 = bridge
S = thickness

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Round holes, straight / RG

W = width
T = spacing
S1 = bridge
S = thickness

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Round holes, diagonal / RD

W = width
T = spacing
S1 = bridge
S = thickness
A0 = Relative free hole area

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Square holes, straight / QG

W = width
T = spacing
S1 = bridge
S = thickness

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Square holes, diagonal / QD

W = width
T = spacing
S1 = bridge
S = thickness

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Oblong holes, lengthways, staggered / LLV

W = width
L = length
T1 = division of the side
T2 = division of the head
S1 = sidebridge

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Oblong holes, lengthways, in rows / LLR

W = width
L = length
T1 = division of the side
T2 = division of the head
S1 = sidebridge

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Wire cloth, square mesh / DQ

${A}_{0}=100×{\left(\frac{w}{w+d}\right)}^{2}$

Maschenweite w ist der Abstand zwischen zwei benachbarten Kett- oder Schussdrähten, in der projizierten Ebene gemessen.
Drahtstärke d ist der Durchmesser des Webedrahtes, vor dem Verweben gemessen.

Calculation

The open screen areas (A0) refers to the percentage of mesh openings over the entire scree surface. A0 determines the flow resistance.

### Oblong holes, rectangular / LR

W = width
L = length
T1 = division of the side
T2 = division of the head
S1 = sidebridge