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Geometrical Properties of Rectangular Tube


rectangular-tube.png

Dimensions

h = m, tw = m

b = m, tf = m

b1 = b – 2·tw m

h1 = h – 2·tf m

Area

A = 2·(h·tw + b1·tf) m2

A = h·bh1·b1 m2

Centroid

yc = b/2 m

zc = h/2 m

Perimeter

P = 2·(h + b) m

Second moments of area

Iy = (b·h3b1·h13)/12 m4

Iz = (b3·hb13·h1)/12 m4

Polar moment of area

Ix = Iy + Iz m4

Radii of gyration

ry = √Iy/A m

rz = √Iz/A m

rx = √Ix/A m


Substitute