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Open area - elefant® gratings
  
  
Note:
The stated values are intended for guidance only and vary with the grating and material dimensions.
Standard gratings:
Open area of gratings with horizontal bars:
 
Mesh
2 mm bars
3 mm bars
9 x 30
76%
68%
15 x 15
77%
69%
20 x 20
82%
75%
20 x 30
85%
79%
30 x 30
87%
82%
50 x 50
92%
88%
100 x 100
95%
94%

 
 
 
 
Louvre gratings:
Open area of gratings with 20x2 mm vertical bars and 30x2 mm 45° horizontal bars. The first mesh in is 30 mm.
 

Mesh

Closed front

Open front

20 x 20

56%

 

20 x 30

58%

 

20 x 40

59%

 

20 x 60

60%

 

30 x 30

 

67%

30 x 60

 

69%