Where a building has been altered so that the live load increases due to the change in use within the same occupancy and the existing structural floor system is found to be inadequate to support the new loads; the following compensating construction is required: remedial measures shall be taken to support the proposed loads. the loading on the floor shall be restricted to the loads that the floor is capable of supporting and signs shall be posted. early warning and evacuation systems shall be installed to comply with Table 11.4.3.3. (a) or (b)