Inputs
m/s (3-s gust)
buildings = 0.85
m
m
m
rigid bldgs ≈ 0.85
Method & assumptions
- Directional procedure (ASCE 7-22 Ch. 27 simplified) for enclosed regular-shape buildings, MWFRS.
- Velocity pressure: qz = 0.613·Kz·Kzt·Kd·Ke·V² (V in m/s, q in N/m²) ; imperial: qz = 0.00256·Kz·Kzt·Kd·V² (V in mph, q in psf).
- Topographic factor Kzt = 1.0, ground elevation factor Ke = 1.0 assumed.
- Kz from ASCE 7 Table 26.10-1 (Exp B/C/D).
- Wall pressure coefficients Cp: Windward 0.8, Leeward depends on L/B, Side −0.7.
- Roof Cp for flat / low-sloped roof (worst case −1.04 windward zone shown).
- Net p = q·G·Cp − qi·(GCpi); both signs of internal evaluated.
Results
Kz at h—
Velocity Pressure qh—
L/B ratio—
Leeward Cp—
Design Pressures (with worst-case GCpi)
| Surface | Cp | p (+ GCpi) | p (− GCpi) | Worst |
|---|