What is the velocity pressure coefficient K_z?

K_z accounts for wind speed variation with height above ground. At z = 10m: K_z = 0.85 (Exposure B), 1.00 (C), 1.03 (D). Increases with height. ASCE 7 Table 26.10-1 gives K_z for each exposure category.

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

MWFRS (Main Wind Force Resisting System) loads are for overall structural design (frames, shearwalls). C&C (Components and Cladding) loads are for individual elements (windows, wall panels, roof decking). C&C pressures are typically higher.

What exposure category should I use?

Exposure B: urban/suburban, wooded areas (most common). Exposure C: open terrain with few obstructions. Exposure D: unobstructed water surfaces. Exposure A (dense urban) is optional in ASCE 7-22. Choose based on site surroundings within 1.6 km upwind.

Wind Load ASCE 7 Calculator

Calculate design wind pressure per ASCE 7-22: q_z = 0.00256·K_z·K_zt·K_e·V² (psf). MWFRS and C&C pressures. Exposure categories A-D. Topographic factor K_zt for hills and escarpments. Gust factor G.

2D stress state at a point. All stresses in MPa.

σx — Normal Stress X (MPa)

σy — Normal Stress Y (MPa)

τxy — Shear Stress (MPa)

⚙ Mechanical Note: Results are based on standard textbook formulas and ISO/AASHTO references. Always verify critical designs with applicable codes (ISO 898, AASHTO 1993, AISC, Eurocode 3) and a qualified engineer.

How to Use

Enter the values for the patient or scenario you are assessing. Calculate design wind pressure per ASCE 7-22: q_z = 0.00256·K_z·K_zt·K_e·V² (psf). MWFRS and C&C pressures. Exposure categories A-D. Topographic factor K_zt for hills and escarpments. Gust factor G. Use the wind load result to inform your clinical assessment.

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Frequently Asked Questions

What is the velocity pressure coefficient K_z?

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

What exposure category should I use?