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C � <br /> Elrod Engineering LLC <br /> Project 100z3582 Pet Supplies Plus File 100x3582 <br /> Subjbct 30"Channel letters Date : 9/4/2019 <br /> Location : Zephyrhills,FL Eng TBG <br /> Desein Wind Pressure.o.Equation 30.4-1(ASCE 7-10). <br /> System Type Structure Type Equation <br /> Components and Cladding Low-Rise Buildings p :gh[(GCp)—(GCpi)] <br /> (Envelope Procedure) with h<=60 ft qh :velocity pressure at h <br /> Gabled&Hipped Roofs GCp :Figures 30.4-1&30.4-2 <br /> GCpi Table 26.11-1 <br /> Velocity Pressure Calculations: <br /> Velocity pressure qh is calculated in accordance with section 30.3. <br /> qh=Velocity pressure @ mean roof height(h) <br /> qh=Constant•Kh•Kzt•Kd V Z (Eq 30.3-1) <br /> Where:Constant = Numerical Constant (Section C27.3.2) <br /> _ '/:•[(Air density lb/cu ft)/(32.2 ft/sl)] [( <br /> mi/h)(5280 ft/mi)•(1 hr/3600 s)]x <br /> = 0.00256 <br /> Mean Sea Level = 0.00 ft <br /> Air Density @MSL = 0.0765 Ib/cu ft (Table C27.3-2) <br /> Occupancy Category = If (Table 1.5-1) <br /> Exposure Category = C (Section 26.7.3) <br /> a = 9.50 (Table 26.9-1) <br /> Zg = 900.00 ft (Table 26.9-1) <br /> Basic Wind Speed = 140.00 mph (Figure 26.5-1 A-C) <br /> Mean Roof Height = 25.00 ft <br /> Where: Kh = Velocity pressure coefficient @ height h <br /> = 2.01•(Z/Zg)^(2/a)for 15 ft<=Z<=Zg (Table 30.3-1) <br /> = 2.01•(15/Zg)^(2/a)for Z<15 ft <br /> = 0.95 <br /> Kzt = Topographic factor (Figure 26.8-1) <br /> _ (1+K1•K2•K3)2 <br /> Topography = None <br /> Kzt @h = 1.00 <br /> Kd = Wind directionality factor (Table26.6-1) <br /> = 0.85 <br /> qh = 40.32(psf) <br />