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, <br /> Task; Wind;Loading on Balcony Rails (Glass Infill) , <br /> ASCE`7 16, Chapter 29. Wind Loads oh Other Structures and Building Appurtenances 7 MWFRS' <br /> ASCE 7 16, Section 29,3 applies to balcony;railing as they are open on all sides and most similar to <br /> solid freestanding walls;or signs. <br /> 29.3.1 Sohd Freestanding Walls and Sold Freestanding <br /> Signs. The design wind fore for solid freestanding walls and <br /> solid freestanding signs shall be determined by the following <br /> formula. <br /> '_gf,GC A (lb) <br /> F=q/,GCfAS(N) ; (29.3-1 si) <br /> where <br /> ;qh velocity pressure evaluated at:height h(defined in.Fig 29.341) <br /> ',.as determined-in-accordance-with-Section 26.10;- s __--.- <br /> G ;gust effeet factor from Section 26.11. <br /> f=`net force coefficient from Fig. 29.3-1. <br /> As=gross area of the solid freestanding wall or freestanding <br /> solid sin, in ft2 M2 <br /> G = 0.85 (Section 26.11) Rigid building 6r Other structure <br /> Cf = 1.45 from Figure 29 3 1 (B'= 48",s 43", h=s Aspect;ratio B/s = 1.1) <br /> 26.10.2 Velocity Pressure. Velocity pressure q„ evaluated!at <br /> height z above ground shall be calculated by the following <br /> equation::_ _Er_—_ .__ <br /> q,=0.00256KzKz1KdKeV2(lb/ft2); V in mi/h (26.10-1) <br /> __ . q;,,,=(}613K,K,K dICVz N m2 • Virxm s (26.10-1-:#1 ._..... <br /> Where <br /> KZ=velocity pressure exposure coefficient,see Section 26.10 1. ------ ---- • <br /> K„=topographic factor, see.Section 26.8.2. <br /> Kd=wind directionality factor, see Section 26:6. - `- <br /> Ke=ground elevation factor, see Section 26.9. <br /> V=basic wind speed, see Section 26.5. Example Calc for:125 <br /> q,=velocity pressure at height;._.. . . mph wind, Exp B, 20 <br /> ;......The velocity. pressure at mean roof :height is computed <br /> ft above ground <br /> as /h qz -v., a,-, o g <br /> height h. <br /> qh = 21.2 psf (Sectioh 26.10.2) KZt = 1, Kd .85, Kz (.... 625= (20 ft tall), V = 125 mph <br /> F = 21.2 psf* .85 * 1.45 = 26.1 psf(LRFD) or26.1 * 0.6 = 15.7 psf (ASD) * area <br /> Project Job no. <br /> James G. Pierson, Inc. Innovative Glass Railing System <br /> Consulting Structural Engineers LocationDate 3/30/20 <br /> Washington and Oregon <br /> 610 S.W.Alder,Suite 918 Portland,Oregon.97205 <br /> Tel: (503)226-1286 Fax: (503) 226-3130 che1t Sheet no. <br /> Innovative Aluminum Systems, Inc. Page 5 of 12 <br />