705.12.1.1 Criteria.
BC § 705.12.1.1
With respect to the design fire within the existing building over which the proposed building is cantilevered, the analysis shall include a scenario to burn-out, where any active fire suppression systems do not operate, the fire department does not intervene, all interior vertical compartmentation, including at the entrances to the stairways, has been removed, and the fuel loading exceeds what is normally expected for the current occupancy by a factor of safety acceptable to the commissioner. Where there is no existing building below the cantilever, or where the existing building below the cantilever is significantly underbuilt, the commissioner may require additional data and analysis.
