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MOI_Ibeam

 

 

This procedure  returns properties of an I-beam.

 

Inputs

h = height [m, ft]

b = width [m, ft]

n = height of removed section [m, ft]

t = thickness of web [m, ft]

 

Outputs

A = area [m^2, ft^2]

I = moment of inertia [m^4, ft^4]

Z = section modulus [m^3, ft^3]

rho = radius of gyration [m, ft]

y_bar = distance from bottom of beam to neutral axis [m, ft]

 

Example: 

$Load Mechanical Design  

$UnitSystem SI K Pa 

$VarInfo A units=m^2

$VarInfo I  units=m^4

$VarInfo rho units=m

$VarInfo Z units=m^3

$VarInfo y_bar units=m

h=0.15 [m]

b=0.15 [m]

n=0.125 [m]

t=0.0125 [m]

Call moi_ibeam(h,b,n,t: A, I, Z, rho, y_bar)

 

{Solution:

A=0.005313 [m^2]

I=0.00001981 [m^4]

rho=0.06106 [m]

y_bar=0.075 [m]

Z=0.0002641 [m^3]

}

 

Reference: Marks' Standard Handbook for Mechanical Engineers, 10th Edition, Avallone, E. A. and T. Baumeister III, eds., McGraw Hill, (1996).

 

Moment of Inertia Index