Round hole in staggered row (RT)
Perforation mark: R (w) T (t)
- Open area (%): A0 = (90,7 * w2) : t2 u %
- Number of holes per m2: n = 1.154.700:t2
- x = number of distances u; u = 0,866t
- b2 = y * v + w
- y = number of distances v; v = 0,5t
- Perforation direction: a1 ili b1
Round holes in diagonal row (RM)
Perforation mark: R (w) M (t)
- Open area (%): A0 = (78,5 * w2) : t2 u %
- Number of holes per m2: n = 1.000.000:t2
- a2 = Z1 * g + w
- Z1 = number of distances g parallel to a2
- b2 = Z2 * g + w
- Z2 = number of distances g parallel to b2
- g = 0,707t
- Perforation direction: a1 ili b1
Round hole in staggered row (RT)
Perforation mark: R (w) Z (t1 x t2)
- Open area (%): A0 = (78,5 * w2) : 0,5 * (t1 * t2) u %
- Number of holes per m2: n = 1.000.000 : 0,5(t1 * t2)
- a2 = t1 * x + w
- x = number of distances t1
- b2 = t2 * y + w
- y = number of distances t2
- Perforation direction: a1 ili b1
Round hole in parallel row (RU)
Perforation mark: R (w) U (t)
- Open area (%): A0 = (78,5 * w2) : t2 u %
- Number of holes per m2: n = 1.000.000 / t2
- a2 = x1 * u + w
- x1 = number of distances t parallel to a2
- b2 = x2 * t + w
- x2 = number of distances t parallel to b2
- t = w + c
- Perforation direction: a1 ili b1
Round hole in parallel row (RU)
Perforation mark: R (w) U (t1 x t2)
- Open area (%): A0 = (78,5 * w2) / t1 * t2 u %
- Number of holes per m2: n = 1.000.000 / t1 * t2
- a2 = x1 * t + w
- x1 = number of distance t parallel to a2
- b2 = x2 * t + w
- x2 = number of distances t parallel to b2
- t = w + c
- Perforation direction: a1 ili b1
Europerforation
Perforation mark: R5 EURO
- Open area (%): A0 = 8,38 u %
- Number of holes per m2: n = 4.272
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