Laserfiche WebLink
Te k I a Te d d s Project Job Ref. <br /> ARW Engineers Section Sheet no./rev. <br /> 1594 W Park Circle 1 <br /> Ogden,UT 84404 <br /> Calc.by Date Chk'd by Date App'd by Date <br /> N 5/27/2021 <br /> WIND LOADING <br /> In accordance with ASCE7-16 <br /> Using the directional design method <br /> Tedds calculation version 2.1.08 <br /> 4- 25 ft-- ►j k---20 ft --►1 <br /> 2 <br /> 3.3 ft F <br /> Wall/sign data <br /> Length of wall/sign B=25.00 ft <br /> Height of wall/sign s=6.00 ft <br /> Height to top of sign h =6.00 ft <br /> General wind load requirements <br /> Basic wind speed V=98.0 mph <br /> Risk category <br /> Velocity pressure exponent coef(Table 26.6-1) Kd=0.85 <br /> Ground elevation above sea level z9i= 149 m <br /> Ground elevation factor Ke=exp(-0.0000362 x zgi/1ft)=0.98 <br /> Exposure category(cl 26.7.3) B <br /> Gust effect factor Gf=0.85 <br /> Minimum design wind loading(c1.27.4.7) pmin_r=8 lb/ft2 <br /> Topography <br /> Topography factor not significant KZi= 1.0 <br /> Velocity pressure <br /> Velocity pressure coefficient(Table 26.10-1) Kr= 0.57 <br /> Velocity pressure qh=0.00256 x Kz x Kz, x Kd x Ke x V2 x 1psf/mph2 = 11.7 psf <br /> Area of sign Af= Bxs= 150ft2 <br /> Ratio of solid area to gross area e= 1.00 <br /> Wall/sign forces-Case A and B <br /> Force coefficient(Figure 29.3-1) Cf_A= 1.35 <br /> Resultant force FA= max(16psf, qh x Gf x CI_A) x At=2.4 kips <br /> Wall sign forces-Case C <br /> Number of whole regions-main wall N5= Int(B/s) =4 <br /> Length of balance-main wall Lbaiance= B-3 x s=7.0 ft <br /> Region 1 -0.0 ft to 6.0 ft <br /> Force coefficient(Figure 29.3-1) Cf_c_o to s=2.73 <br /> Effective area Af c f = s x s=36.0 ft2 <br /> Resultant force FA_c_, = max(16psf, qh x Gf x (1.8-s/h) x Cf_C_ofos) x Af_C_1 =0.8 kips <br /> Region 2-6.0 ft to 12.0 ft <br /> Force coefficient(Figure 29.3-1) Ct_c_s to 2s= 1.92 <br /> Effective area Ai c 2 = s x s=36.0 ft2 <br />