Biloxi Wind Pressure & DP Rating Calculator

Estimates the design wind pressure acting on a window, door, or shutter opening in the Biloxi coastal wind zone, following ASCE 7 velocity-pressure methods. Educational estimator — a licensed engineer must verify final design pressures. The tools below answer the questions homeowners around Biloxi, MS ask most often when they are weighing up accordion hurricane shutters.

Basic wind speed V (mph, 3-sec gust) 150 mph — Biloxi coast, Risk II (ASCE 7-16) 160 mph — Risk III/IV coastal 140 mph — inland Harrison/Jackson Co. 130 mph — northern MS Custom… Mean roof height h (ft) Exposure category C — open terrain / coastal (typical Biloxi waterfront) B — suburban with houses/trees Opening location Zone 5 — near a building corner (edge strip) Zone 4 — mid-wall interior Envelope status during the storm Sealed — windows/doors intact (GCpi ±0.18) Breached — one opening lost (GCpi ±0.55) Calculate Pressure

Estimated wind pressure on your openings

Velocity pressure q_h = psf (at roof height ft, exposure , K_z=)

Demand	Zone 4 mid-wall	Zone 5 corner
Outward suction (negative)
Inward pressure (positive)

Method: q_h = 0.00256·K_z·K_zt·K_d·K_e·V² (K_zt=1 flat site, K_d=0.85, K_e=1 sea level). Wall C&C coefficients per ASCE 7 Fig 30.4-1 for ~10-20 SF effective area (Zone 4 ≈ +0.9/−1.2, Zone 5 ≈ +0.9/−2.4). Estimates only — verify with the product's Miami-Dade NOA / TAS 201 rating and a licensed engineer.