Given a L3-1/2x4x1/4 angle with lateral restraint to prevent torsion, to find out the nominal flexural strength Mn, F10-7 applies and gives Mn=Fy*Sc*(2.43-1.72*(b/t)*Sqrt(Fy/E)). Fy=50ksi, E=2.9e7psi, b=4",t=1/4". If Sc is interpreted as the section modulus of whole section at the compressed...
JAE, I have the same thoughts as you have. But, I cannot convince my colleague, because per my interpretation the allowable bending stress of a L3-1/2X4X1/4 section, in which the 4" vertical leg's tip in compression, is larger than the yield stress. That is not making sense. The calculation is...
The definition of Sc in F10-7 of Specification for Structural Steel Building (2005) is not clear to me. The note on page 16.01-60 says: "Sc=elastic section modulus to the toe in compression relative to the axis of bending. For bending about one of the geometric axes of an equal-leg angle with no...
