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Open Area Calculation of Perforated Metal

In order to let our customers be clear about how many percent the holes occupying the sheet, we work out the formulas to calculate the open area of perforated sheets. Including the round shape perforation, square shape perforation, slot shape perforation, as well as hexagonal shape perforation.

Round shape perforation - 45°staggered

The picture shows the specification pattern of 45 degree staggered round perforation.
D
C
 
 
 
 

Round shape perforation - 60°staggered

The picture shows the specification pattern of 60 degree staggered round perforation.
D
C
 
 
 
 

Round Perforation - Straight Line

The picture shows the specification pattern of straight line round perforation.
D
C1
C2
 
 
 
 

Round Perforation - Straight Line

The picture shows the specification pattern of straight line square perforation.
S
C1
C2
 
 
 
 

Round Perforation - Straight

The picture shows the specification pattern of staggered square hole perforation.
S
C1
C2
 
 
 
 

Round - End Slot - End Staggered

The picture shows the specification pattern of end staggered round end slot shape perforation.
W
L
C1
C2
 
 
 
 

Round - End Slot - Side Staggered

The picture shows the specification pattern of side staggered round end slot shape perforation.
W
L
C1
C2
 
 
 
 

Round - End Slot - Straight Line

The picture shows the specification pattern of straight line round end slot shape perforation.
W
L
C1
C2
 
 
 
 

Hex Perfoation

The picture shows the specification pattern of hexagonal shape perforation.
S
C
 
 
 
 

Square - End Slot - Straight

The picture shows the specification pattern of straight line square end slot perforation.
W
L
C1
C2
 
 
 
 

Square - End Slot - Staggered

The picture shows the specification pattern of staggered square end slot perforation.
W
L
C1
C2