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<br />~Barrett. ~ <br />Windload Calculations <br /> <br />0-15 Exp. B <br /> <br />. .~i... d V,',A :::'n".~L lA.h\'L" L Y WITH ALL <br /> <br />For: J.M. Stewart Co. <br /> <br />: 'REV AlLING CODES, FWRIDABUllDING <br /> <br /> ., -- . - ~ -. ,~~ <br />Purchase Order No.: 937585 Footer I ..~ <br /> - . <br />Sign Type & Name: Announcer Supra Steel Column I Ok <br />Drawing Number: AN-U-N-1022 Bolts Tension Ok <br />Date: 3/17/2005 Variables: Bolts Shear Ok <br />Approx. Sign Wt. 500 I Ibs. Footer: length L: 5.5 ft. Columns: 2 <br />Wind Speed 120 J mph width W: 2.5 ft. b= 4 in <br />Max.Sign Height 0-15 feet depth H: 4 ft. d= 4 in <br />Importance Factor* 1.00 Bolts: Spacing: 9 in. ell h= 3.625 in <br />Vel. Press. Coef.** 0.57 Qty: 1 k= 3.625 in <br />Gust Response** 0.85 Dia.: 0.302 in^2 w= 0.1875 in <br />Velocity Pressure: Qz=. 00256(Kz) (I) (V^2) Area 1 Area 2 Area 3 Area 4 Area 5 Area 6 <br /> 21.01 Area: 15.33 46.16 0.00 0.00 0.00 0.00 <br />Design Pressure: P=(Qz)(Gh)(Cf) height 4.00 5.33 0.00 0.00 0.00 0.00 <br /> width 3.83 8.66 0.00 0.00 0.00 0.00 <br /> hlw ratio 1.04 0.62 0.00 0.00 0.00 0.00 <br /> ANSI 7-98 T.6-11 P.66 Cf 1.20 1.20 1.20 1.20 1.20 1.20 <br /> Pressure 21.43 21 .43 21.43 21.43 21.43 21.43 <br />Structural Material: 46000 centroid 2.00 6.67 9.33 9.33 9.33 9.33 <br />Steel Fb - 46,000 psi wind force 328.64 989.29 0.00 0.00 0.00 0.00 <br />Alum. Fb- 35,000 psi <br />Allowable Lateral <br />Soil Load 200.00 psf - <br />Allowable Soil Load 2000 psf Free Bodv DiaQram <br />Qz - Velocity pressure at height Z Wind Force <br />Z - Height off groung of Sign 989.29 <br />Kz = Velocity Pressure Exposure Coefficient** ~ <br />I - Importance Factor * <br />V - Velocity <br />P - Design Pressure <br />Gh = Gust Response <br />Ct - Force Coefficient for Solid Signs - / . <br />Cv -Coefficient of Total Shear ....... IRL riJ ~ ...,.." <br />D - Sign Width t.,"\ E P? I~" III W /} IJ <br />H - Sign Height ' ~ < .~.-';~\J!3 DEP APPRO\ EO./ A If?' '!( <br /> ;1)~ <br /> , ~ 11 <br /> Wind Force ..... <br />- Calculations conform to 10.67 328.64 <br />- ACSE 7-98. From table 6-5 <br />- page 60, the Velocity <br />c-- Pressure Exposure <br />- Coefficient (Kz) structures <br />- less than 15 feet high under 6.00 <br />f--- exposure "B" with gust Note: Clockwise moments + <br />f--- response factors as described <br />f--- on P 29, SECTION 6.5.8.1 Ma ~\ <br />I--- Gh = .85. Structural Tubing / <br />I--- is ASTM A500 Grade B. / <br /> Bolts are ASTM A307. I R1 <br />- Concrete Strength is 2500 psf I , <br /> / t <br />- minimum. <br />- ... -t <br /> / 2.67 <br /> It"' <br /> Mo /",\ J Mb <br /> \.....1. k+ +V <br /> ~ <br /> ~ 1.67 ~ <br /> R2 <br /> <br />Florida #44816 <br />New York #063279-1 <br /> <br />Page 1 of2 <br /> <br /> <br />John F. Barrett, PE <br />3/17/2005 <br /> <br />John Francis Barrett, PE <br />8259 Barton Farms Blvd. <br />Sarasota, FL 34240 <br /> <br />D:\Jms 7-98\937585.xls <br />