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Except for the modifications as set forth in Sections 3412A and 3413A all additions, alterations, repairs and seismic retrofit to existing structures or portions thereof shall be permitted to be designed in accordance with the provisions of ASCE 41. When load combinations which do not include seismic forces are required, the new building code provisions of this code shall be applicable.
3412A.1.1 ASCE 41 Section 1.4 — Performance Objectives
Target building performance level shall be as follows:
  1. For general acute care hospital buildings along with all structures required for their continuous operation or access/egress.
    1. Immediate Occupancy (IO) Structural Performance Level (S-1) as defined in Section 2.3.1.1 at Basic Safety Earthquake 1N (BSE-1N) Seismic Hazard Level; and
    2. Life Safety (LS) Structural performance level (S-3) as defined in Section 2.3.1.3 at Basic Safety Earthquake 2N (BSE-2N) Seismic Hazard Level;
    3. The nonstructural components shall satisfy the requirements of this code for new construction.
      Exception: Performance objectives for upgrading nonconforming hospital buildings to SPC-4D and for incidental or minor alterations or repairs of SPC-4D buildings shall be in accordance with Section 3412A.2.3.2 of this code.
  2. For incidental and minor additions, alterations or repairs of pre-1973 hospital buildings which will not be used for general acute care services after January 1, 2030:
    1. Life Safety Structural Performance (S-3) Level as defined in ASCE 41 Section 2.3.1.3 at the Basic Safety Earthquake 1E (BSE-1E) Seismic Hazard Level; and
    2. Collapse Prevention (CP) building performance level (5-D) in accordance with Section 2.3.3.4 at the Basic Safety Earthquake 2E (BSE-2E) Seismic Hazard Level; and
    3. The nonstructural components shall satisfy the requirements of Position Retention Nonstructural Performance Level (N-B) in accordance with ASCE 41 Section 2.3.2.2 at BSE-1E Seismic Hazard Level.
  3. All other hospital buildings:
    1. Operational Building Performance Level of (1-A) as defined in Section 2.3.3.1 at Basic Safety Earthquake 1N (BSE-1N) Seismic Hazard Level;
    2. Life Safety (LS) building performance level (S-3) as defined in Section 2.3.1.3 at Basic Safety Earthquake 2N (BSE-2N) Seismic Hazard Level.
3412A.1.2 Material Testing Required
Use of material properties based on historical information as default values shall not be permitted.
3412A.1.3 Analysis Procedure
The selection of a particular analysis procedure from ASCE 41 shall be subject to the approval of the enforcement agency.
3412A.1.4 Structural Design Criteria
Prior to implementation of ASCE 41 Nonlinear Dynamic Procedure, the ground motion, analysis and design methods, material assumptions and acceptance criteria proposed by the engineer shall be reviewed by the enforcement agency.
3412A.1.5 Alternative Modeling Parameters and Acceptance Criteria
Where analysis/modeling parameters or acceptance criteria for structural elements are not provided in ASCE 41 or are considered to be inadequate, the analysis/modeling parameters or acceptance criteria shall be permitted to be established on the basis of test, using a criteria acceptable to the building official, and ASCE 41 Section 7.6.3.
3412A.1.6 Construction, Structural Observation, Testing, and Inspections
Construction, testing, inspection and structural observation requirements shall be as required for new construction.

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