
Moment of Inertia, Section Modulus, Radii of Gyration Equations
I Sections 
Moment of Inertia, Section Modulus, Radii of Gyration Equations I Sections
A = 
Area (in^{2}, mm^{2}) 
I = 
Moment of Inertia (in^{4}, mm^{4}) 
G_{r} = 
Radius of Gyration = (in, mm) 
y = 
Distance of Axis to Extreme Fiber (in, mm) 
Section 



Moment
of
Inertia 

Slope
g = (h  l) / (b  t) 

Radius
of
Gyration 



Area 



y 



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