| |
|
| STRAIGHT |
|
 |
Oblong Slot Hole: 
Rectangular Slot Hole: 
Millimetre System:
Holes per Sq. Inch = |
|
% Open Area = |
x x y - 0.215 x y2 |
x 100 |
A x F |
|
|
|
 |
| SIDE STAGGERED |
|
 |
Holes per Sq. Inch
= |
|
% Open Area = |
2
x x x y - 0.43y2 |
x 100 |
A x F |
|
|
|
|
| END
STAGGERED |
|
 |
Holes per Sq. Inch
= |
|
% Open Area = |
2 x x x y - 0.43y2 |
x 100 |
A x F |
|
|
| Note: |
All above formulas are for Oblong Slot Holes. |
| |
For Rectangular Slot Holes: |
|
|
|
(a) % Open Area (Staggered) = |
2 x x x y |
x 100 |
A x F |
|
| (b) % Open Area (Straight) = |
x x y |
x 100 |
A x F |
|
| |
(c) For Holes (Rectangular) per Sq. Inch., formulas are same as of Oblong Slots shown above for individual pattern. |
|
|
| PERFORATION
PATTERN |
 |
1)
Oblong Slot Parallel to Width
2) Oblong Slot Parallel to Length
3) Oblong Slot End Staggered Parallel to Width
4) Oblong Slot End Staggered Parallel to Length
5) Oblong Slot Side Staggered Parallel to Width
6) Oblong Slot Side Staggered Parallel to Length |
|
|
|
