Hi, I have a question regarding the calculation for the required thickness of the gusset plate when is used for stiffening the bending of the steel angle. (See attached drawing) Without the gusset plate, the moment resistant of the steel angle is insufficient to resist the moment created by the eccentrically applied load at the tip of the angle flange, therefore we sometimes introduce the gusset steel plate in perpendicular direction between the two legs of the steel angle. I use the section modulus of the gusset plate (thickness and depth of gusset plate) to determine the min. thickness of gusset plate required, but I'm not confidence if I'm doing right.
Can anyone provide me feedback on how to check the required thickness of the gusset plate?