MULTI RESPONSE MODIFICATION FACTOR

Hallo, i have model with combination of steel ordinary moment frame (OMF) and concrete special moment  resisting frame (SRMF).

is there a way to create multi response seismic factor (R) in 1 staad file?

with R for steel 3.5, and

R for concrete is 8. 

or the only way is to divide the design file to design this issue?