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Project#: GED-328/7170287111 Date:8/17/2017 <br /> Site#: WA6064/FA #10013187 By:NM <br /> MORRISON HERSHFIELD <br /> aae RE,K <br /> The following beams have been selected for this analysis: G,RDER ENDONS 7oPBAR MILD REIK <br /> B,YD l <br /> Beam W D fe Al B1 Cl <br /> Mark (in) (in) (ksi) (in) (in) (in) <br /> TENDONS o •9 STI r <br /> PB115 12 21 187.6 17.000 2.250 15.000 TENDONS sLVRDRTeAR <br /> CONT <br /> PB116 12 21 187.6 15.000 2.250 15.000 STIRRUP TIES Izi Yi 32`OD 11.h <br /> STIRRIAS REO'D MISS TIGHTER. <br /> SPACING IS NOTED rx SCEDLL.E. <br /> PB119 12 21 134.0 14.500 14.500 17.875 GIRDER —BOTTOM BAR <br /> BEYpO - MILD REIK <br /> PB121 12 21 134.0 17.875 2.250 15.000 • <br /> ;1 <br /> • <br /> Calculated concrete compressing and tensile stress limits per I • <br /> • <br /> ACI318-14,all beams are considered uncracked [Class U]: <br /> Simple/End Mid-span Cont./fixed <br /> Permissible stress limit (P ,) (P ,) (P st ACI318-14 Ref. <br /> s� si <br /> Compressive at Initial prestress,fc;= 2100 1800 1800 Table 24.5.3.1 <br /> Tensile at initial prestress,ft,= 329 164 164 Table 24.5.3.2 <br /> Compressive at service level,f = 3300 2475 2475 Table 24.5.4.1 <br /> Tensile at service level, ft= 411 411 411 Table R24.5.2.1 <br /> Beam Loading: <br /> Load Description Distributed Concentrated Remark <br /> Roof slab+Joist+20 psf roofing as <br /> D Dead Load [Self Weight]: 689 plf - - <br /> specified <br /> SD Dead Load [Superimposed] 28 plf 1.79k 2.34k Ballast point load + Elec./Mech. as <br /> specified <br /> L Roof Live Load 325 plf - - 50 psf for Beams/Girders as specified <br /> Total Service Level Load <br /> T 1042 plf 1.79k 2.34k Total Service Load <br /> [D+SD+ L] <br /> Beam Forces[see attached Risa3D output]: <br /> A-Simple/End(ft-kip) B-Mid-span(ft-kip) C-Cont./fixed(ft-kip) <br /> MD= - 81.6 -145.1 <br /> Mso= - 39.8 -53.7 <br /> M L= - 23.7 -48.6 <br /> MT= - 143.2 -247.1 <br /> Beam Stresses[see attached Risa3D output]: <br /> Based on analysis,all stresses do not exceed limit stress at initial transfer of prestress and service level. <br /> Stress at Initial Transfer(psi) Stress at Service Level(psi) <br /> Beam Ab Bb Cb At Bt Ct Ab Bb Cb At BE Ct <br /> Mark <br /> PB115 -540 -661 -430 -540 -633 -542 -536 -632 -626 -536 -253 50 <br /> PB116 -432 -661 -430 -432 -633 -434 -429 -632 -626 -429 _ -253 50 <br /> PB119 -405 -432 -585 -405 -404 -407 -287 -289 -284 -287 -17 145 <br /> PB121 -587 -661 -430 -587 -633 -589 -416 -452 -446 -416 -180 35 <br />