Circular Hollow Round Sections per BS EN 10210-2 Calculator
Outside diameter d x Wall Thickness t =
mm x mm
Mass  pre metre = kg/m
Area of section = cm2
Ratio for local buckling d/t = -
Second moment of area = I = cm4
Radius of gyration i = cm
Elastic modulus Wei = cm3
Plastic modulus Wpl = cm3
Torsional constant IT = cm4
Torsional constant Wt = cm3
Surface area per metre = m2
Surface area per tonne = m2