In an engineering sense, when is 50ksi material required in lieu of 33ksi material?
• The 33ksi or 50ksi refers to the “grade of steel” or its yield point.This is a material property for strength, not for stiffness or resistance to deflection. Generally speaking, 50ksi material tends to be more likely required in high load applications (heavy floors, heavily loaded load bearing studs, load bearing headers). 50ksi is rarely required in curtainwall applications.
