Has anyone worked problem 528 of the most recent (copyright 2011) practice exam? It is asking for the allowable load based on the bending in an angle leg. I understand the bending based on the elastic analysis with Sx, but I' not finding the reference for the plastic analysis. I'm familiar with the plastic section modulus, Zx, for beam bending but have always used the values right out of the tables.
The solution is using 0.25*b*h^2 for the plastic section modulus. Is there a specific reference for this? Also, it states Mp<1.6My. Is there a specific reference for this as well? Thanks.
The solution is using 0.25*b*h^2 for the plastic section modulus. Is there a specific reference for this? Also, it states Mp<1.6My. Is there a specific reference for this as well? Thanks.