How do I calculate wind loads per ASCE 7-22?

ASCE 7-22 uses the Directional Procedure (Chapters 26-31) for Main Wind Force Resisting System (MWFRS) loads. Enter basic wind speed, building dimensions, exposure category, and roof parameters. The calculator computes velocity pressure, exposure coefficients, and design wind pressures for all building surfaces.

What is the difference between MWFRS and C&C wind loads?

MWFRS (Main Wind Force Resisting System) loads apply to the overall structural frame—beams, columns, shear walls. C&C (Components and Cladding) loads apply to individual elements like roof panels, windows, doors. MWFRS uses larger tributary areas and lower pressures; C&C uses smaller areas with higher localized pressures.

How do exposure categories affect wind loads?

Exposure B (urban/suburban): Kz = 0.57-1.03. Exposure C (open terrain): Kz = 0.85-1.20. Exposure D (coastal): Kz = 0.95-1.27. Higher exposure = higher wind speeds at building height = higher design pressures. Exposure D requires 1.15× higher pressures than Exposure B at 30 ft height.

What roof slope affects wind pressure distribution?

Flat roofs (≤10°): Uniform uplift on entire roof. Low slopes (10-30°): Windward positive pressure, leeward negative (uplift). Steep slopes (>30°): Windward positive, leeward near-zero. Hip roofs reduce corner zone pressures compared to gable roofs. The calculator handles all roof types per ASCE 7-22.

How do I account for wind directionality?

ASCE 7-22 applies a 0.85 directionality factor (Kd) for buildings. This accounts for wind not always hitting the worst-case orientation. The calculator automatically applies Kd = 0.85 for enclosed buildings. For open structures, Kd may be 0.90-0.95.

What is the importance factor for wind loads?

Importance Factor (Iw) depends on Risk Category: Category I (low hazard): Iw = 0.87. Category II (normal): Iw = 1.00. Category III (high occupancy): Iw = 1.15. Category IV (essential facilities): Iw = 1.15. Higher importance = higher design wind loads for critical structures.

Wind Load Calculator

ASCE 7-22Chapters 26-31MWFRS

ASCE 7-22Chapters 26-31

Calculator Input

Enter wind speed, building geometry, and site parameters to calculate design wind pressures and forces.

Frequently Asked Questions

Common questions about this calculator

Wind Load Calculator

Wind Speed & Site

Building Dimensions

Roof Parameters

Topography & Elevation

Frequently Asked Questions

Wind Load Calculator

Wind Speed & Site

Building Dimensions

Roof Parameters

Topography & Elevation

Frequently Asked Questions

01How do I calculate wind loads per ASCE 7-22?

02What is the difference between MWFRS and C&C wind loads?

03How do exposure categories affect wind loads?

04What roof slope affects wind pressure distribution?

05How do I account for wind directionality?

06What is the importance factor for wind loads?