Calculating open area (in acc. with ISO)

Calculate the open area of a perforate sheet based on the diameter of the spacing.
Note: the material thickness should not exceed the margin width and the diameter.

Round holes staggered
Pitch 60 °

Rv
Relative open area, %
Calculate
Lochblech-Durchlass Rundlochung versetzt

Round holes straight
Pitch 90 °

Rg
Relative open area, %
Calculate
Lochblech-Durchlass Rundlochung gerade

Square holes straight
Pitch 90 °

Qg
Relative open area, %
Calculate
Lochblech-Durchlass Quadratlochung gerade