(DIN 24 041)

Definition:

a1 / b1	= external dimension of plate (acc.to hole pattern)
a1 / b1	= external dimension of the perforated area (acc. to hole pattern)
s	= thickness of material
w	= hole thickness
l	= hole length
t	= pitch
c	= width of bridge
A0	= open surface = open screening area
n	= number of holes per sq.m.

LV Oblong holes, staggered rows

Edge:

Standard edge e1 and e2 = 20 to 40 + t1 and f1 and f2 = 20 to 40 + t2 resp. u (average value of different production processes) is determined by the size of plates, width of hole and pitch. Smaller or larger edges e1, e2, f1 and f2 are dependent on the pitch and width of hole.

Please enclose a drawing or sketch with your enquiry or order for special plates or plates with unnormal edges.

Examples:

Description of oblong holes in staggered lines (Lv) with hole width w = 4 mm, pitch t1 = 5.5 mm, t2 = 25 mm

Holes Lv 4 x 20 - 5,5 - 25 DIN 24 041

Description of a perforated plate, 1 mm thick, b1 = 1000 mm, a1 = 2000 mm, hole Lv 4 x 20 – 5.5 – 25, with normal edge, made of steel sheet.

Perforated plate 1 x 1000 x 2000 Lv 4 x 20 - 5,5 - 25 DIN 24 041 steel sheet

Description of a perforated plate, 1 mm thick, b1 = 1100 mm, a1 = 1600 mm with fixed sizes, hole Lv 4 x 20 – 5.5 - 25, with edge (Ra) e1 = 38 mm, e2 = 20 mm and f1 = 24 mm and f2 = 33 mm, made of steel sheet.

Perforated plate 1 x 1100 x 1600 fix Lv 4 x 20 - 5,5 - 25 Ra 38/20 x 24/33 DIN 24 041 steel sheet

Lg Oblong holes, straight rows

Lge Oblong holes, straight rows, angular