518 51ST ST SW 2023-06-23 - Laserfiche WebLink

• 16 of 23 Project Number: Plan Name: Sheet Number. S201001-1XR 518 51ST ST SW,EVERETT,WA 98203 Engineer Subject: Date: FY 2ft Unreinforced Conc Beam 12/29/2020 DEMAND CALCULATION number of stories n 1 stories span L 8.0ft [max on-center pile spacing] concrete area A 216 in2 'see attached concrete self weight SW 225 plf [Includes total height w/o ACI14 414.5.1.7 redux] Pt DL DL 3.60 k = 8.0 ft '946 [1-story loading] Pt LL LL 2.20 k = 8.0 ft *980 [1-story loading] Pt LLr LLr 3.00 k = 8.0 ft .100 [1-story loading] moment from DL MDL 9,000 lb-ft 108.0 k-in moment from LL Mu 4,400 lb-ft 52.8 k-in moment from SL MLLr 6,000 lb-ft 72.0 k-in factored moment MLRFD 151.2 k-in 1.4DL MLRFD 250.1 k-in 1.2DL+1.6LL+0.5SL MLRFD 297.6 k-in 1.2DL+1.6SL+LL controlling factored moment M. 297.6 k-in factored shear Vans 3.8k 1.4DL VAR, 5.8 k 1.2DL+1.6LL+0.55E VLRro 6.7 k 1.2DL+1.65E+LL controlling factored shear VR 6.7 k controlling factored bearing B„ 6.7 k [Roy for SS beam] STRENGTH CALCULATION concrete strength f c 2.5 ksi assumed light wt concrete mod.factor ,L,A 1 normal weight concrete 4 flexure strength red.factor 'n, 0.9 tension-controlled ACI14[Table 21.2.1] shear strength red.factor Chem 0.75 ACI14[Table 21.2.1] bearing strength red.factor 4)bR,,,,B 0.65 ACI14(Table 21.2.1] moment of ineritia Ix, 11,016 in4 "see attached elastic section modulus 5,,, 1,001 in3 'see attached tens fiber to NA c 11.0 in 'see attached nom flexure strength(T controls) M„ 250.4 k-in M„=5d f'cS„, ACI 318-14[Eq.14.5.2.1a] nom flexurestrength(C controls) M„ 2,128.1 k-in 1/.-u,v;l's''. ACI 318-14[Eq.14.5.2.1b] RESIDENTIAL CONCRETE M, 375.5 k-in M„=7.551S,„ CONTROLS ACI 332-14[Eq.8.2.1.1] flexure strength 4 M„ 338.0 k-in >Mu OK D/C=88.05% nom shear strength V„ 14.4 k V =3 A n A ACI14[Table 14.5.5.1(a)] shear strength 4iVn 10.8 k >Vu OK D/C=62.41% loaded bearing area A, 74 in2 [IDEAL 2-7/8"Tru-Force Underpinning Bracket] supporting surface bearing area A, 74 in2 (If the supporting surface is>than loaded area] nom bearing strength 6„ 156.6 k 0.85/,•.A, ACI14[Table 14.5.6.1(c)] bearing strength OB. 101.8 k >Su OK D/C=6.62% Additional Verification Calc: max concrete tensile strength f, 375 psi f=7,5AsiTc ACI 14[Eq.19.2.3.1] max beam tensile stress F, 297 psi Pt=(M*c)llsx f, >Ft OK