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Pattern Layout & Open Area Calculation
Handbook for Perforated Metals
Drawing Center
Drawing Center
Hole Type
Round
Square
Slot
Finish Type
Unfinished
Finished Random
Finished Square
Hole Dimensions (inches)
Hole Size:
Centers:
Pattern Type
60 Deg
45 Deg
Straight
Hole dimensions may be entered as decimals and/or fractions.