Wind Load on Solid Walls and Freestanding Signs

Output:

Definitions
• q_z = velocity pressure at height z, the centroid of sign area
• G = Gust factor from Section 26.11
• C_f = Force coefficient from Figure 29.4-1
• C_o = Opening Reduction Factor
• C_c = Case C Reduction Factor
• A_f = Sign area
• K_d = 0.85 (Table 26.6-1 Solid freestanding walls and signs)
• s/h = 0.50
• B/s = 2.00
• M, T = Moment and Torsion at center base, respectively
Determine Velocity Pressure, Area, and Opening Reduction Factor
• psf
• ft²
Case A
• C _f = 1.70(from Figure 29.3 - 1 for Case A and B)
• lb
• ft-lb
Case B
• C _f = 1.70 (from Figure 29.3 - 1 for Case A and B)
• lb
• ft-lb
• ft-lb
Case C
• psf
• Using Figure 29.3-1 for Case C:
• C_f,0 = 2.25 at 0s to 1s (0, 5). F_c,0 = f_C*A₀*C_f,0 = 638.1 lb
• C_f,1 = 1.50 at 1s to 2s (5, 10). F_c,1 = f_C*A₁*C_f,1 = 425.4 lb
• F_C = Σ F_c,i = 1063.5 lb
• ft-lb
• T_C = 531.7 ft-lb
User Notes:
User notes