Laserfiche WebLink
Structural <br />Engineering & Design Inc. <br />BEAM <br />Section <br />CITY OF SANTA ANA <br />Planning and Building Agency <br />Approved <br />FOR PERMIT ISSUANCE <br />By: NIHAL _ Project: THE DOT PRINTER i Proiect #: 25-0421-7 <br />ration: TYPE 1 SELECTIVE RACK <br />Beam= Meca ux U1017 4" x 2.5" x 15 ga <br />Ix=Ib= 1.629 inA4 2.50 in <br />Sx= 0.764 inA3 <br />t= 0.067 in E= 29500 ksi 1.50 in <br />Fy=Fyv= 55 ksi F= 150.0 <br />Fu=Fuv= 65 ksi L= 96 in <br />Fya= 59.8 ksi Beam Level= 2 <br />P=Product Load= 2,200 lb/pair <br />D=Dead Load= 60 lb/pair <br />1. Check Bending Stress Allowable Loads <br />Mcenter=F*Mn= W*L*W*Rm/8 <br />W=LRFD Load Factor= 1.2*D + 1.4*P+1.4*(0.125)*P RM12.2, item 8 <br />FOR DL=2% of PL, <br />Rm= 1 - [(2*F*L)/(6*E*Ib + 3*F*L)] <br />1 - (2*150*96 in)/[(6*29500 ksi*1.629 inA3)+(3*150*96 in)] <br />= 0.913 <br />if F= 0.95 <br />Then F*Mn=F*Fya*Sx= 43.40 In-k <br />Thus, allowable load <br />per beam pair=W= F*Mn*8*(# of beams)/(L*Rm*W) <br />= 43.4 in-k * 8 * 2/(96in * 0.913 * 1.599) <br />= 4,955 lb/pair allowable loadbased on bending stress <br />Mend= W*L*(1-Rm)/8 <br />_ (4955 lb/2) * 96 in * (1-0.913)/8 <br />= 2,587 in -lb @ 4955 lb max allowable load <br />= 1,148 in -lb @ 2200 lb imposed product load <br />2. Check Deflection Stress Allowable Loads <br />4.000 in <br />1.625 in <br />0.067 in <br />------------------ <br />Rrodact <br />. . . . . . .... <br />Beam <br />Length � <br />Dmax= Dss*Rd <br />Rd= 1 - (4*F*L)/(5*F*L + 10*E*Ib) Allowable Deflection= L/180 <br />= 1- (4*150*96 in)/[(5*150*96 in)+(10*29500 ksi*1.629 in^4)] = 0.533 in <br />= 0.896 in Deflection at imposed Load= 0.237 in <br />if Dmax= L/180 Based on L1180 Deflection Criteria <br />and Dss= 5*W*LA3/(384*E*Ib) <br />L/180= 5*W*LA3*Rd/(384*E*Ib*# of beams) <br />solving for W yields, <br />W= 384*E*I*2/(180*5*LA2*Rd) <br />= 384*1.629 inA4*2/[180*5*(96 in)^2*0.896) <br />= 4,966 lb/pair allowable load based on deflection limits <br />Thus, based on the least capacity of item 1 and 2 above: Allowable load= 4,955 lb/pair <br />Imposed Product Load= 2,200 lb/pair <br />Beam Stress= 0.44 Beam atLevel 2 <br />6 " 2-- <br />