what is the cutting length of 90 degree bend in four corner
ring in column of 8mm dia size of column 450mmx250mm of
clear cover 20mm?

Answer Posted / vinay

(450+450+250+250)-8(20){dedudting covers on all 8 sides}+2*10*8{adding hook length 2*10*d}-5*2*8{deducting on all 5 sides 5*2*d}=1320mm

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