Program Process-Step 7 - Final Risk Reduction Design and Planning ProcessAlternatives to rehabilitation include removal of the building from the inventory by sale with full disclosure, demolition, permanent evacuation of the building, or change in occupancy of the building such that it becomes exempt of low risk.
If seismic rehabilitation is selected as the risk reduction option, preparation of final designs and all necessary construction documents are initiated. The designs are prepared in accordance with specific seismic rehabilitation codes for existing buildings, as required by Executive Order 12941. This is the first BSSP step in the overall Program Process that is reimbursable. BSSP Portfolio Funding can be used to address the design costs.
Note: Further information regarding the BSSP Portfolio Funding is located on the "Program Process"
page, which can always be found via the links near the top of the page or in the left-hand column.
Further information regarding Executive Order 12941 is located on the "Executive Orders and
Public Laws" page, which can also always be found via the links near the top of the page or in the
Structural Rehabilitation PhaseWhen risk reduction actions are justified as a result of the high level of risk, the BSSP prioritizes buildings based on annualized loss-of-life (ALOL) results and coordinates risk reduction efforts with the Regional and Area Offices seismic safety contacts. Parameters such as Occupancy at Risk (OAR), site soil classification, model building type, and acceleration variables are further scrutinized since they directly impact the ALOL risk calculations. The Program Process then continues in proposing a construction program to reduce the seismic risk in the highest priority, highest risk building.
The next step is the design and construction phase or, rather, "Structural Rehabilitation Phase" where final designs and construction specifications are proposed. There are several important activities that take place prior to and during this phase that are key to a successful rehabilitation design project. In addition to design and construction development activities, several studies may be needed—if not already performed in the Peer Review and Planning Refinement Process (Step 5)—to clarify the mitigation scenarios. These studies include hazardous materials studies, materials testing studies, removal of interior and exterior finish for structure verification (FR&R plan), and geological and seismotectonic studies. The results of any one of these could have bearing on the mitigation options for the structure. The goal at the end of this Structural Rehabilitation Phase is a completed set of construction documents ready for issuance of a solicitation for the project.
Structural rehabilitation designs used to reduce seismic risk in buildings are performed in accordance with the ASCE/SEI Standard 41-06, Seismic Rehabilitation of Existing Buildings (ASCE/SEI 41-06) (supersedes FEMA 356, 274, and 273), as required by Executive Order 12941.
Nonstructural Rehabilitation PhaseA cursory list of potential nonstructural hazards is identified in the completed seismic evaluation. A complete assessment of nonstructural hazards is outside the scope of the Seismic Evaluation Process (Step 3). An assessment process (or phase) is necessary to make a final determination of which nonstructural components are deficient and require rehabilitation. This phase is identified by the BSSP specifically as Nonstructural Hazards Quantification (NHQ).
The NHQ will assist in quantifying, locating, and generating a complete listing of the potential nonstructural deficiencies and in estimating rehabilitation costs. In order to mitigate nonstructural hazards, it is recommended that building management apply the techniques identified in the BSSP's Nonstructural Hazards Rehabilitation Guidelines, Volumes I and II once the NHQ has been completed. It is recommended that the NHQ be completed once the structural deficiencies have been mitigated.