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Their is formula given in a code i think SP-32

L=N*Pie(D+d)+8d

L=Length of Spiral rings

N=Number of Spirals

Pie=3.142(constant)

D= Diameter of pile cage(spiral C/C)

d=diameter of bar

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Their is formula given in a code i think SP-32 L=N*Pie(D+d)+8d L=Length of Spiral rings N=Number of Spirals Pie=3.142(constant) D= Diameter of pile cage(spiral C/C) d=diameter of bar


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