Component importance factor Ip = 1.5 for life-safety-critical components, components meeting the adopted ASCE 7 hazardous-substance criteria, and components in or attached to a Risk Category IV structure that are needed for continued operation or whose failure could impair it; otherwise Ip = 1.0
Ip = 1.5 (scoped)observed
| Value kind | observed — Reported measurements, counts, and specifications keep the precision and scope stated by their source; an exact specification is not treated as a range. |
|---|---|
| Scope | Ip is assigned according to the component’s function and failure consequences, not categorically to every component in every data center. It is distinct from the structural seismic importance factor Ie. |
| As of | 2026-10 |
| Source | National Institute of Standards and Technology, NIST GCR 23-037 (January 2023) · Section 2.3.3 and Table 2-2, pp. 48–49; Section 3.3.3, pp. 85–86 |
| Review | checking…review by 2027-10-01 · standard cadence |
| Recorded changes | last 2026-10-15 · 3 revisions tracked |
| Claim id | seismic-importance-factor-for-data-centers-as |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.