A typical situation in provincial NZ: Two storey building, small plan footprint (say 150m2) , one internal stair with no inter-floor separation around the stairwell. Cannot use intermediate floor solution.
Need to make each storey a separate firecell which means building a wall around the stair at one of the storeys.
But is a safe path necessary if the DEOP from the upper storey down the stairs to the final exit at the ground storey is compliant? I.e. one open path.