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Calculate Section Properties of a Square Channel Section:

Calculation:
Designer/Checker:

Input:

(Note: All input Metric units are converted to English units for the equations below and then the output English units are converted back to Metric)

Width of the flange (bf - in or mm)
Thickness of the flange (tf - in or mm)
Depth of the beam (d - in or mm)
Thickness of the web (tw - in or mm)

Output:

h = d-2tf, x = (2(bf^2)tf+h(tw^2))/(2bfd-2h(bf-tw)), y = d/2
Moment of Inertia x-axis, Ix = (bf(d^3) - (h^3)(bf - tw))/12
Moment of Intertia y-axis, Iy = ((2tf(bf^3) + h(tw^3))/3) - A(x^2)
Area of section, A = Aw + Af = tw(h) + 2(bftf)
Section modulus of x-axis, Sx = Ix/(d/2)
Section modulus of y-axis, Sy = Iy/(bf-x)
Radius of gyration of x-axis, rx = (Ix/A)^0.5
Radius of gyration of y-axis, ry = (Iy/A)^0.5
Plastic section modulus of x-axis, Zx = (tw(d-2tf)^2/4) + bf(d^2 - (d-2tf)^2)/4
Plastic section modulus of y-axis, Zy = htw(x-tw) + 2bftf(bf/2-x)
Approximate warping constant for I shapes, Cw = ((d-tf)^2)tf(bf^3)/24
Approximate torsional constant, J = (2(bf)(tf^3)/3) + ((tw)^3)(d-2tf)/3
Constant, c =(( Iy/Cw)^0.5)(d-tf)/2

Moment of Inertia x-axis, Ix =
Moment of Intertia y-axis, Iy =
Area of section, A =
Section modulus of x-axis, Sx =
Section modulus of y-axis, Sy =
Radius of gyration of x-axis, rx =
Radius of gyration of y-axis, ry =
Plastic section modulus of x-axis, Zx =
Plastic section modulus of y-axis, Zy =
Approximate warping constant, Cw =
Approximate torsional constant, J =
Constant c =

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