ASCE 7-16 Wind Speed Calculator
Here’s a comprehensive table summarizing the key information about wind speed in ASCE 7-16:
ASCE 7-16 Wind Speed Table
| Aspect | Details |
|---|---|
| Basic Wind Speed (V) | – Defined as 3-second gust speed at 33 ft (10 m) above ground in Exposure C |
| Wind Speed Maps | – Located in Figures 26.5-1 to 26.5-2 of ASCE 7-16 |
| Risk Categories | – I, II, III, and IV (based on building use/occupancy) |
| Units | – Given in both mph and m/s3 |
| Interpolation | – Required between known wind contours on maps |
| Exposure Categories | – B, C, and D (affects wind speed calculations) |
| Wind Directionality Factor (Kd) | – Typically 0.85 for buildings |
| Topographic Factor (Kzt) | – Usually 1.0 for flat terrain, otherwise calculated |
| Ground Elevation Factor (Ke) | – Considers air density variation based on elevation |
| Velocity Pressure Coefficient (Kz) | – Varies with height and exposure category |
| Calculation Method | – Directional Procedure (Chapter 27) or Envelope Procedure (Chapter 28) |
| Design Wind Pressures | – Calculated using velocity pressure and various coefficients |
Additional Considerations
- Automated Calculations: Tools like SkyCiv Wind Design Software can automate wind speed and pressure calculations.
- ASD vs. Ultimate Design: Wind speeds in ASCE 7-16 are based on Ultimate Design; use a 0.6 reduction factor for Allowable Stress Design (ASD).
- Local Building Codes: Always check local building codes, as they may have specific wind speed requirements or amendments.
This table provides a concise overview of the key factors involved in determining and using wind speed data according to ASCE 7-16 for structural design purposes.