11.1 Nonstructural Performance Categories
Each building shall be assigned a Nonstructural Performance Category (NPC), based upon the degree of anchorage and bracing of selected nonstructural elements and systems. This includes architectural, mechanical, electrical and hospital equipment in addition to associated conduit, ductwork, piping and machinery. NPCs are defined in Table 11.1.
|TIMEFRAMES||NONSTRUCTURAL PERFORMANCE CATEGORY1||DESCRIPTION|
|NPC 1||Buildings with equipment and systems not meeting the bracing and anchorage requirements of any other NPC.|
|January 1, 2002||NPC 2||The following systems are braced or anchored in accordance with Part 2, Title 241:|
|January 1, |
2024 (SDC F),
2030 (SDC D),
|NPC 3||The building meets the criteria for NPC "2" and in critical care areas, clinical laboratory service spaces, pharmaceutical service spaces, radiological service spaces, and central and sterile supply areas, the following components meet the bracing and anchorage requirements of Part 2, Title 242: |
|January 1, |
|NPC 4D Levels 1, |
2, or 3
|The building meets the criteria for NPC "3," and for systems listed in Levels 1 to 3 below, meets the bracing and anchorage requirements of Part 2, Title 242. |
|January 1, |
|NPC 4||The building meets the criteria for NPC "3" and all architectural, mechanical, electrical systems, components and equipment, and hospital equipment including all elevator(s) meet the bracing and anchorage requirements of Part 2, Title 242. This category is for classification purposes of the Office of Emergency Services.|
|January 1, 2030||NPC 5||The building meets the criteria for NPC "4" or NPC "4D" and onsite supplies of water and holding tanks for sewage and liquid waste, sufficient to support 72 hours emergency operations, are integrated into the building plumbing systems in accordance with the California Plumbing Code. An onsite emergency system as defined in the California Electrical Code is incorporated into the building electrical system for critical care areas. Additionally, the system shall provide for radiological service and an onsite fuel supply for 72 hours of acute care operation.|
2. For the purposes of NPC 3 and NPC 4 or NPC 4D in SPC 2, SPC 3, SPC 4 or SPC 4D, buildings, all enumerated items within Table 11.1 shall meet the requirements of the 1998 CBC, Section 1630B or equivalent provision in later version of the CBC, by the specified timeframe. The adequacy of anchorage and bracing may be limited to the connection of the component or equipment to the support when the total reaction at the point of support (including the application of Fp) less than or equal to the following limits:
3. 2,000 pounds for components or equipment attached to floors or slabs-on-grade.
Exception: If the anchorage or bracing is configured in a manner that results in significant torsion on a supporting structural element, the effects of the nonstructural reaction force on the structural element shall be considered in the anchorage design.
The evaluator shall:
- Visit the building to observe and record the type, nature and physical condition of the nonstructural elements and systems for the planned NPC;
- Note the SPC of the buildings based on procedures followed in Article 2;
- Verify existing data;
- Develop other needed data (e.g., measure and sketch building if necessary);
- Verify the critical nonstructural systems of the planned NPC;
- Verify the critical care areas/services; and
- Identify special conditions which may impact the nonstructural systems or endanger the function of the critical care areas/services.
- Review other data available such as assessments of building performance and function following past earthquakes;
- Prepare a summary of data using an OSHPD approved format;
- Perform the evaluation using the procedures in Section 11.2; and
- Prepare a report of the findings of the evaluation using an OSHPD approved format.