Deflection Limits: seismic-story-drift-dce
Serviceability deflection and drift limits per IBC 2021 Table 1604.3 and ASCE 7-22 — floor beams, roof members, exterior walls, interior partitions, and story drift for seismic and wind
| member type | load case | applicable load combination | limit denominator (dimensionless) | limit description | limit ratio | notes |
|---|---|---|---|---|---|---|
| seismic-story-drift-dce | seismic | seismic | 50 | Seismic story drift — Risk Category I and II (DCE drift per ASCE 7 Table 12.12-1) | H/50 | Allowable story drift = 0.020 hsx for most RC and steel structures RC I-II |
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