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October 30, <br />2025 NEWPORT STRUCTURAL DESIGN – PROJECT NUMBER 2025-1305 <br /> <br />Per ASCE 7-16, Table 13.5-1 the booth most closely falls into the category of “other flexible <br />components – high-deformability elements and attachments”. The High Deformability Rp value was <br />chosen because these structures are built from panels that have a very high ductility. Fu / Fy = 45 <br />ksi / 24 ksi = 1.875. Additionally, the bolts between panels have a significantly higher shear strength <br />than the panels themselves, which means that the primary failure mode of the structure would be <br />shear yielding of the panels, a high-deformation but ductile failure mode. <br />The following design parameters therefore apply: <br /> Rp = 3.5 <br /> Ω0 = 2.5 <br />ap = 2.5 <br />z = 0 (installed at ground level) <br />fp = (0.4)*(2.5)*(1.019g)*(1 + 0) / (3.5 / 1) = 0.291 (Eqn 13.3-1) <br />fp.max = 1.6*(1.019g)*(1.0) = 1.63 (Eqn 13.3-2) <br />fp.min = 0.3*(1.019g)*(1.0) = 0.306 (Eqn 13.3-3) <br />Therefore, fp = 0.306 <br />Per ASCE 7-16, Table 13.6-1 the duct falls into the category of “Ductwork with joints other than <br />welding”. The following design parameters therefore apply: <br /> ap = 2.5 <br />R = 6 <br /> Ω0 = 2 <br />z = 1 (installed at roof) <br />fp.duct = [0.4*ap*SDS / (Rp/Ip)]*(1 + 2*(1)) = 0.510g > 0.3*SDS*Ip (Eqn 13.3-3) <br />Assume that the duct is 18 gauge. Its self weight would be 4.6 lbs/ft. The seismic force on the <br />would be: <br />(15 ft)*(4.6 lbs/ft)*(0.510g) = 36 lbs <br /> <br />