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Technical Specification

The formulae on this page are used to calculate the open area of a user defined perforation. The results are calculated automatically by clicking the "Submit" button when you have entered all the relevant figures.


1. Calculation of open area: round holes, triangular pitch

R
T
 
 

2. Round Hole, Straight Pitch

Enter hole size in mm: R
Enter pitch 1 in mm: U1
Enter pitch 2 in mm: U2
 

3. Square hole, Staggered  Pitch

C
U1
U2
 

4. Oblong Hole Staggered Pitch

C
Z1
Z2
 
 

5. Calculation of open area: slot holes, staggered pitch

R
L
Z1
Z2
 

6. Square Hole, Straight Pitch

C
L
Z1
Z2
 
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