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• <br /> • Task; Wind Loading on Balcony Rails (Glass Infdl) <br /> ASCE'7-16, Chapter 29: Wind Loads on Other Structures and Building Appurtenances MWFRS <br /> ASCE,? 16, Section 293 applies to balcony;railing as they are open on all sides and most similar to <br /> solid freestanding wallslor signs. <br /> 29.3.1 Solid Freestanding; Walls and Solid Freestanding <br /> Signs. The design-wind force for solid freestanding walls and ; <br /> solid freestanding Sign$ shall be determined by the following <br /> .... .formula: I �.-. .._ - _. ,__ <br /> '=ghGCf A,(1b) ._.. (29.171) <br /> F'=ghGCfAS(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 __ . . <br /> G=;gust=effect factor from Section 26.11 <br /> f=met force coefficient from Fig. 29.3 1. <br /> AS gross area of the solid freestanding wall, or freestanding <br /> solid sign, in ft2 (m2). <br /> G = 0.85 (Section 26.11) Rigid building or Other structure <br /> Ct = 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, qz, evaluated at <br /> height z above ground shall be calculated by the following <br /> equation:__ __. <br /> qz-0.00256KKztKdKe i'2(16/ft2); V in mi/h ; (26.10 1) <br /> 0t613K_K,K Ke.%2 N rn2 V in'm s (26.10-1:si <br /> where <br /> K velocitexposure coefficient;see Section 26.101. ,---- <br /> YPressure ex p <br /> K=1=topographic factor; seeI Section 26.8.2. <br /> Kd=wind directionality factor, see Section 26 6. <br /> e=ground elevation factor, see Section 26 9 <br /> V=basic wind speed, see Section 26.5. Example Calc'for'•125 <br /> qz=velocity pressure at height z._. h <br /> wind, Exp B ;20 <br /> __The velocity_pressure at mean roof height is computed above ground <br /> a 'h, qz:-v.; a.-e •,o ' :a. '- s' g _ a o.' <br /> height h <br /> qh = 21.2 psf(Sectioh 26.10.2): KZ, = 1, K :85, KZ = 0 625 (20 ft tall), V = 125 mph <br /> F = 21.2 psf* .85 * 1.45 = 26.1 psf(LRFD) or.26 1 *'0.6 = 1,5.7 psf (AS.D) * area <br /> Project Job no. <br /> JamesG. Pierson, Inc. Innovative Glass Railing System <br /> Consulting Structural Engineers Location Date <br /> 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 Clie1t Sheet no. <br /> Innovative Aluminum Systems, Inc. Page 5 of 12 <br />