Article 11 Evaluation of Critical Nonstructural Components and Systems
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.
NONSTRUCTURAL PERFORMANCE CATEGORIES
|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.
- Site visit and data collection;
- Identification of building SPC;
- Identification of critical nonstructural systems for the planned NPC;
- Identification of critical care services housed in the building;
- Final evaluation for the critical nonstructural elements and systems for the planned NPC;
- Preparation of evaluation report; and
- Submittal of evaluation report to OSHPD.
- The building is designated "NPC 1" in conformance with Table 11.1 "Nonstructural Performance Categories," or
- The building was designed and constructed under a building permit issued by OSHPD;
- All subsequent repairs, remodels, additions and alterations were performed under a permit issued by OSHPD, and
- Fire sprinkler systems have been retrofitted in conformance with Table 11.1, "Non-structural Performance Categories."
- The report shall be stamped and signed by a California licensed structural engineer certifying, in a form acceptable to the Office, compliance with the requirements of NPC 2.
- The report shall state that the systems and equipment listed in Table 11.1 for NPC 2 compliance either comply with or have been modified to comply with the requirements of Chapter 16A, 1995 California Building Code or equivalent provision in later version of the CBC.
- The report shall state what specific deficiencies have been addressed in the NPC 2 upgrade projects, and provide OSHPD project numbers for these projects.
- The report shall state that the corrective work required for NPC 2 compliance has been completed under permits issued by OSHPD.
- If a hospital owner sells or leases the hospital to another party, a complete nonstructural evaluation and list of all nonstructural deficiencies to achieve NPC 5 shall be submitted to the Office prior to the completion of the sale or lease.
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;
- Construction drawings, specifications and calculations, and
- All drawings, specifications and calculations for remodeling work.
- 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.
The following steps shall determine if the building meets the criteria for NPC 2:
- Identify the specific nonstructural components and equipment that are subject to the requirements of NPC 2 as specified in Table 11.1;
- Conduct an inventory of components and equipment, noting whether the items are anchored or braced;
- Installed under a permit issued by OSHPD. Drawings showing the installation and bearing an OSHPD approval stamp are required to show that the installation conforms to Part 2, Title 24; or
- Reviewed and approved by the Department of General Services, Office of Architecture and Construction, Structural Safety Section. Drawings showing: a) the installation; b) bear an Office of Architecture and Construction, Structural Safety Section approval stamp; and c) a five-digit project number on the approval that begins with the "H" prefix, are required to demonstrate that the installation conforms to Part 2, Title 24. It shall also be demonstrated by a written report submitted by the structural engineer, acceptable to the enforcement agency, that an investigation of the anchorage and bracing of components and equipment identified in Section 11.2.1(a) shows it to be constructed in reasonable conformity with these drawings.
- If the components and equipment inventoried in 11.2.1(b) is anchored or braced, but does not meet the requirements of Section 11.2.1(c), determine if the bracing and anchorage is sufficient to meet the code requirements specified in Table 11.1. The bracing capacity shall be determined by calculations based upon information shown in the construction documents. If these documents are incomplete or unavailable, the evaluation shall be based on the as-built conditions, with the capacity of fasteners to masonry, concrete or wood determined by approved tests; and
- If any of the items inventoried in 11.2.1(b) are unanchored or inadequately braced as determined by Section 11.2.1(d), the building shall be placed in NPC 1.