Laserfiche WebLink
<br />AEC Services, Inc. <br /> <br /> <br />For Your Complete A/E1C Needs <br /> <br />AEC Services, Inc. <br />333 N. Faulkenburg Road <br />Suite # A-101 <br />Tampa, FL 33619 <br />813-684-1234 <br />(f) 813-684-2660 <br /> <br />Ron Fair, P.E. FL# 50738 <br /> <br />Pole Signage <br /> <br />1. <br /> <br />Design Wind Velocity <br />Velocity Pressure (Vp) <br />Use Factor (Fu) <br /> <br />= 110 MPH <br />= 30.0 PSF <br />= 0.90 <br /> <br />2. <br /> <br />Height <br />Width <br />Centroid of Force (C) <br />Area of Force (A) <br /> <br />= 4.33 FT <br />= 8.2 FT <br />= 5.0 FT <br />= 35.51 SF <br /> <br />M/N (Large/Smaller) <br />Therefore the Force Coefficient (cf) <br /> <br />= 2.00, which is <= 6.0 <br />= 1.20 <br /> <br />MOMENT = (Vp)(A)(Fu)(Cf)(C) <br /> <br />= 5,752.6 LB-FT <br /> <br />3. Dual Columns, therefore % of Moment must be met in Column: <br /> <br />Sx (required) of column = Moment X (12)X(0.5) / Fb = (5,752.6)(0.50)(12) / (24,000) = 1.44in. -3 <br />From Steel Manual; 4"x4" squar X 0.500" Min. Squar Steel Pipe, has Sx (selected) = 6.13in.-3 <br /> <br />Sx (selected) EXCEEDS Sx (required), therefore ~. <br /> <br />4. Assume buoyant weight of concrete = 88 PCF <br />Assume soil pressure = 400 PSF / foot of depth <br /> <br />Soil Resistive Moment (Sr) + Concrete Weight Moment (Mc) >> Moment (calculated) <br /> <br />2.00 ft Ling (I) A = (0.68)(d)(w)[(0.34)(d)(400)) = 5538 LB-FT <br />5.67 ft wide (w) B = (0.32)(d)(w)[(0.90)(d)(400)) = 6899 LB-FT <br />3.25 ft deep (d) Total Soil Resistance (Sr) = 12437 LB-FT <br /> Mc = [(w)(l)(d)(88))[1.0] = 3243 LB-FT <br /> Total = 15,681 LB-FT <br /> <br />Soil Resistive Moment (Sr) + Concrete Weight Moment (Mc) EXCEEDS MOMENT / column (calc'd), therefore OK <br /> <br /> <br />r <br /> <br />G:\AEC-ENGINEERING-2000\mageesigns\misc\pole WIND _ CALCS.doc <br />