I am trying to understand and set up load cases in Caesar-II for a static-equivalent seismic analysis in compliance with ASME B31Ea-2010.

I contacted the Hexagon help team and exchanged emails with Denny Thomas, but I am still seeking some more detailed/in-depth guidance for how to approach the Load Cases for ASME B31E Para. 3.4

Specifically, I am confused about how to obtain the M_seismic value in the first equation, PD/4t + 0.75i * (M_sus + M_seismic)/Z.

M_seismic is the "elastically calculated resultant moment amplitude due to seismic load, including inertia and relative anchor movement"

In order to isolate the inertial (U1, -U1, U2, U3, -U3) and the SAM (D1, -D1, D2, -D2), do I need to build an operating case for EVERY POSSIBLE COMBINATION OF THESE CASES, then subtract out the OPE cases? Or is it possible to do this in fewer steps? Are any of these cases redundant, or could they all produce relevant values?

L1: W+P+T (OPE)
L2: W+P+T+U1 (OPE w/ inertia cases)
L3: W+P+T-U1
L4: W+P+T+U2
L5: W+P+T+U3
L6: W+P+T-U3
L7: W+P+T+U1+D1 (ope w/ inertia + sam cases)
L8: W+P+T+U1-D1
L9: W+P+T+U1+D2
L10: W+P+T+U1-D2
L11: W+P+T+U1+D3
[...] ADD ALL -U1, U2, U3, -U3 CASES
L20: L2-L1 (isolated inertia cases)
L21: L3-L1
[...]
L26: L7-L2 (isolate SAM cases)
L27: L8-L2
L28: L9-L2
[...]

I will spare you the very long list of possible cases. The confusion sets in when trying to isolate the displacement cases. There will be an isolated "D1" case for U1, -U1, U2, U3, and -U3 cases. I could do a MAX operation on those, but are any of them redundant, or is there a quicker way to do this?