RE: Seismic force distribution in multiple coupled structure in staad in Response spectrum

Thanks for quick reply, however, my query is actually regarding seismic distribution of forces on two structures modelled in same file, with seismic generation command, the seismic force is generated by combining mass of both buildings and not applied building wise, this is also happening , when 2 structures are simply in model without attachment.
In such a case, should I apply seismic lateral load to each node and not generate it for RS case also by taking equivalent load generated during static case.