OBLONG PERFORATIONS PICS

1/8″ X 1/2″ Oblong-
Side Staggered

(.125″x .5″)
1/4″ centers 38% open

1/8″ X 1″ Oblong-
Side Staggered

1/4″ centers 43% open

Method of Measuring Spacing of Perforations

EC = End Centers  E = End Bar
SC = Side Centers S = Side Bar

Side Stagger

Straight Both ways

End Stagger