Wind Load on Open Signs and Single-Plane Open Frames

Output:

Definitions
• q_z = velocity pressure at height z
• G = Gust factor from Section 26.11
• C_f = Force coefficient from Figure 29.4-2
• A_f = Open sign net area
• K_d = 0.85 (Table 26.6-1 Open signs)
• F, M = Force and Moment at center base, respectively
Determine Velocity Pressure, Area, Min Force
q_z = 13.3 psf
• psf
• ft²
• ft²
• in
• lb
Flat-sided Members
F = 453.8 lb / 18.2 psf
• C _f = 1.60 (from Figure 29.4-2)
• lb
• ft-lb
Rounded Members with D_typ ≤ 8.2 in
F = 425.4 lb / 17.0 psf
• C _f = 1.50 (from Figure 29.4-2)
• lb
• ft-lb
Rounded Members with D_typ > 8.2 in
F = 400.0 lb / 16.0 psf
• C _f = 1.10 (from Figure 29.4-2)
• lb
• ft-lb
User Notes:
User notesPer cl. 29.7, a minimum load of 16psf is applied to the vertical projection of the structure.