Most data centers are Risk Category II; Risk Category IV applies when a data center supports designated critical functions or essential facilities, or when Category IV is voluntarily selected for greater resilience
RC II typical; IV if designatedobserved
| 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 | For structural seismic design, Risk Category IV has Ie = 1.5 versus Ie = 1.0 for Category II, but data-center use alone does not trigger Category IV. |
| As of | 2023 |
| Source | National Institute of Standards and Technology, NIST GCR 23-037 · Section 2.1.3.1, “New Data Centers,” p. 31; Section 3.3.3, p. 84 |
| Review | checking…review by 2027-07-26 · slow cadence |
| Recorded changes | last 2026-07-14 · 2 revisions tracked |
| Claim id | mission-critical-classification-under-asce-7-22 |
Where the guide uses it
← Full numbers register — every date-stamped figure in the guide, with revision history.