W
t1/t2
C1
C2
L
a1
b1
a2
b2
e1/e2
f1/f2

 

=width or diameter of the holes
=centre distance of the holes
=bridge inside
=bridge outside
=length of the hole
=width of the panel
=length of the panel
=width of the perforated zone
=length of the perforated zone
=non perforated zone in longitudinal direction
=non perforated zone in transverse direction

DIN/EN/ISO 24043

width x length of the hole.

centre distance

free area

material thickness

W x L

t1

t2

Ao%

0,5

0,75

1,0

1,5

2,0

2,5

3,0

4,0

5,0

6,0

1,0 x 8,0

2,5

13,0

24,0

s

s

4,0 x 20,0

8,0

27,0

35,0

s

s

s

5,0 x 30,0

9,0

36,0

44,5

s

s

s

12,0 x 25,0

20,0

32,0

42,0

s

s

s