Answer Posted / praveen

column - 50d
beam - 60d
1.for examble if u need 20mm dia column lapping 50 x 20 (dia) =1000 mm
then convert mm to inch 1000/25.4 =39.37 inch
finally your 20mm dia rod lapping lenght = 39.37 inch


2 .for examble if u need 20mm dia beam lapping 60 x 20 (dia) =1200 mm
then convert mm to inch 1200/25.4 =47.24 inch
finally your 20mm dia rod lapping lenght = 47.24 inch

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