Rectangular tube

Calculate the second moment of area (also known as moment of inertia of plane area, area moment of inertia, or second area moment) and the section modulus of a profile with rectangular cross section, width A, height B and wall thickness C. Use this to calculate deflection or stress in a loaded profile.

C A B y y G

\( I_{yy} = \dfrac {AB^{3}-(A-2C)(B-2C)^{3}}{12} \)

\( W_{yy} = \dfrac {AB^{3}-(A-2C)(B-2C)^{3}}{6B} \)