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P1.53 <br />Lift: <br />Track: <br />Seismic check: <br />Fp = (0.4 ap SDS Wp) (1 + 2 z/h) / (Rp / Ip) <br /> = (0.4 x 1 x 1.018) (1 + 2 x 0.5) Wp / (2.5/1) <br />Fp=0.325Wp <br />Fp,min= 0.3SDS Ip Wp = 0.305Wp <br />Fp=0.325Wp <br />Wp= Car weight + Mast weight + Enclosure weight = 250lbs + 600lbs + 900lbs = <br />1750lbs <br />Fp=0.325 x 1750lbs = 569lbs <br />Design of Studs: <br />L=38' <br />KL=38' <br />Considering at 3 studs, hence loads/3: <br />Weight from track: <br />LL=155lbs/3 = 51lbs @10ft <br />EL=569lbs/3 = 189lbs @5ft <br />If (2) Studs: <br />Pu = (1.2 + 0.2SDS)D + EL + 0.5 LL = (1.2 + 0.2 X 1.018) x 600lbs + 569lbs <br />+ 0.5 x 155lbs =1488lbs <br />Wu = 1488lbs / 38ft = 39plf <br />Mu=Wu x L2/8 = 39plf x 382 / 8 = 7039lbs-ft = 84k-in <br />Check bending: <br />fMn = 0.9 Fy Z = 0.9 x 40ksi x 2.435in3 = 87.66k-in <br />DCR= Mu / fMn = 84 / 87.66 = 0.95 < 1, <br />Therefore, use (2) 600S162-33. <br />E=Fp <br />F2=600lbs <br />(DL) <br />F5=155lbs <br />(LL) <br />E=Fp <br />LL <br />(=F5) <br />Tr <br />a <br />c <br />k <br /> <br />h <br />e <br />i <br />g <br />h <br />t <br />Tr <br />a <br />c <br />k <br /> <br />h <br />e <br />i <br />g <br />h <br />t <br /> <br />/ <br />2 <br />OC Probation <br />1700 East Saint Andrew Place, Santa Ana, California 92705 <br />23-12434 <br />07/24/2024 <br />LR <br />1700 E St Andrew <br />Pl10/8/2024