Laserfiche WebLink
22 of 30 <br /> Project Number: Plan Name: Sheet Number. <br /> S210803-1XR 1817 HOYT AVE,EVERETT <br /> Engineer: Subject: Date <br /> NJ 2ft Unreinforced Conc Beam 9/26/2u2] <br /> DEMAND CALCULATION <br /> number of stories 0 2 stories <br /> span L 6.0 ft [max on-center pile spacing] <br /> concrete area A 216 in2 'see attached <br /> concrete self weight SW 250 plf [Includes total height w/o ACI14§14.5.1.7 redux] <br /> Pt DL DL 4.30 k = 6.0 ft '946 [2-story loading] <br /> Pt LL LL 4.10 k = 6.0 ft `980 [2-story loading] <br /> PtLLr Llr 2.50 k = 6.0ft '100 [2-story loading] <br /> moment from DL Mot 7,575 lb-ft 90.9 k-in <br /> moment from LL M. 6,150 lb-ft 73.8 k-in <br /> moment from SL MLL, 3,750 lb-ft 45.0 k-in <br /> factored moment MLaro 127.3 k-in 1.4DL <br /> MLRFD 249.7 k-in 1.2DL+1.6LL+0.5SL <br /> MLRFD 254.9 k-in 1.2DL+1.6SL+LL <br /> controlling factored moment M„ 254.9 k-in <br /> factored shear Vmm 4.1 k 1.40L <br /> Vmm 7.4k 1.2DL+1.6LL+0.5SL <br /> Vmm 7.5 k 1.2DL+1.6SL+LL <br /> controlling factored shear V„ 7.5 k <br /> controlling factored bearing e„ 7.5 k [R=V for SS beam] <br /> STRENGTH CALCULATION <br /> concrete strength f'c 2.5 ksi assumed <br /> light wt concrete mod.factor T 1 normal weight concrete <br /> flexure strength red.factor („e, 0.9 tension-controlled ACI14[Table 21.2.1] <br /> shear strength red.factor 4),,,,, 0.75 ACI14[Table 21.2.1] <br /> bearing strength red.factor 4,y,,,,,,c 0.65 ACI14[Table 21.2.1] <br /> moment of ineritio I. 11,016 in4 `see attached <br /> elastic section modulus S, 1,001 in3 `see attached <br /> tens fiber to NA c 11.0 in 'see attached <br /> nom flexure strength(T controls) Mr 250.4 k-in Mn=5A f'cSm ACI 318-14[Eq.14.5.2.1a] <br /> nom flexure strength(Ccontrols) M, 2,128.1 k-in ,t/„-0.85/'S,,, ACI 318-14[Eq.14.5.2.1b] <br /> RESIDENTIAL CONCRETE Mr 375.5 k-in M„=7.55AJS,„ CONTROLS ACI 332-14[Eq.8.2.1.1] <br /> flexure strength 4tM„ 338.0 k-in >Mu OK -1 D/C=75.41% <br /> nom shear strength V„ 14.4 k V„=-3.14 fc.A ACI14[Table 14.5.5.1(a)] <br /> shear strength ci)V, 10.8 k >Vu OK D/C=69.72% <br /> loaded bearing area A, 74 in2 [IDEAL 2-7/8"Tru-Force Underpinning Bracket] <br /> supporting surface bearing area Ai 74 in2 [If the supporting surface is>than loaded area) <br /> nom bearing strength Br 156.6 k It 55/.'.l l ACI14[Table 14.5.6.1(c)] <br /> bearing strength OR, 101.8 k >Bu OK J D/C=7.40% <br /> Additional Verification Calc: <br /> max concrete tensile strength f, 375 psi f=7,5A ACI 14[Eq.19.2.3.1] <br /> max beam tensile stress F, 255 psi At=(M o c) <br /> /fu <br /> f, >Ft OK <br />