When the proposed change in use results in an occupancy class one hazard index number higher than its present occupancy class as defined in Table13-200-170" destination-id="JD_Table13-200-170">13-200-170, the entire building must meet all the requirements of the code for new construction, with the following exceptions:
Existing stairways and elevators may remain but shall be upgraded by one of the following alternative methods:
Stairs and elevators shall be fully enclosed in accordance with the requirements of Sections15-8-140" destination-id="JD_15-8-140">15-8-140 and 15-8-150" destination-id="JD_15-8-150">15-8-150.
Noncombustible doors and assemblies shall be installed in the corridors between exit stairs. Such assemblies need not be rated but shall be constructed, as provided by Section15-8-140" destination-id="JD_15-8-140">15-8-140(a).
The entire building served by the existing stairs shall be provided with a standard sprinkler system, complying with the requirements of Chapter15-16.
Compliance is not required with all the provisions of Chapter13-48 for height and area limitations, however, no existing building may be increased in area or height beyond the limitations of Chapter 13-48.
Compliance is not required with Sections15-8-050" destination-id="JD_15-8-050">15-8-050 and 15-8-100" destination-id="JD_15-8-100">15-8-100 for existing parapets.
(Prior code § 78.1-19)