How are MpM and MpN calculated in RAM connection for base plate flexural yielding due to bearing? I am designing a column with a large moment. I am following AISC's Design Guide 1, but I cannot get my hand calculations to match the values in my RAM report. How are these calculated? Is the value of "Y" as the bearing length shown anywhere in the report? Why are these equations so cryptic!?
I have attached the file in questions. I am looking at the connection with uniaxial bending. By my calculations, I get Y=0.7935" and MplM=12.76kft/ft.
Thanks.