Design Criteria
Residential design criteria
View local jurisdiction design criteria in Table R301.2 , also listed below.
Ground snow load
- N/A
Wind design
- Speed (mph): 110
- Topographic effects: Yes
- Special wind region: No
- Windborne debris zone: No
Seismic design category (R-3)
- D₀
Subject to damage from
- Weathering: Negligible
- Frost line depth: N/A
- Termite: Very heavy
Winter design temperature
- N/A
Ice barrier underlayment required
- N/A
Flood hazards
Air freezing index
- 6
Mean annual temperature
- 60.6° Fahrenheit
Commercial design criteria
Seismic design category
- D (determined by CBC §1613.2.5)
Wind design
- Exposure: C, unless the site complies with the definition for Exposure B
- Wind Speed: See table below for Ultimate Design Wind Speed, 3 second gust (CBC §1609.3).
- Lower design wind speeds may be evaluated on a project specific basis.
| Risk Category | Speed (mph) |
|---|---|
| I | 90 |
| II | 95 |
| III | 105 |
Additional design criteria
Geotechnical investigations/reports
- Soils reports are required for new buildings.
- Exception: Allowable Soil Bearing Pressure of 1500 PSF (CBC Table 1806.2) may be used for small additions, renovations, and minor structures (sheds, utility structures, fences, etc.) without a soils report.
- Many areas of Sacramento contain expansive soil. It is the designer’s responsibility to identify if expansive soil is present. If present, a soils report is required per CBC §1803 and CRC §R401.4. An addendum to the soils report is required if the report is more than three years old or if the soils report references the previous code cycle.
Climate zone
- 12
Water pressure
- 40 psi maximum guaranteed
Rainfall
- 1.5” per hour max for structural design of roof framing elements.
- 3” per hour for the purpose of sizing roof drains, conductors, leaders, gutters, and storm sewers. View Sacramento City Code section 15.24.030 .
Flood plan development
Disabled access
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