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clear
//given
//from example 6.9
St_ul = 2500 //psi - ultimate strength
st_yl = 40000 //psi _ yielding strength
b = 10 //in - width from example
A = 2 //sq.in The area of the steel
d = 20
t_ul = st_yl*A //ultimate capasity
y = t_ul/(St_ul*b*0.85) //in 0.85 because its customary
M_ul = t_ul*(d-y/2)/12 //ft-lb Plastic moment
printf("\n The plastic moment of the system is %0.3f ft-lb",M_ul)
//answer in the textbook is wrong
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