Dear Mr. Dave,

Thanks a lot for the reply.

So I understand that the .frc file can be directly used and only thing I have to change the time values from seconds to ms in the frc file.
The file such as Time-history.frc shall remain in the folder containing the CAESAR II file only with adjustment of the time values from second to millisecond.

Another point, our structural team designs the structures for the dynamic restraints(CAESAR II dynamic output) from max resp case( Combined load case). Is this the correct approach because these forces are momentary in nature. Please advise.

Thanks again and I appreciate your guidance on this matter.

Rgrds