216 73RD ST SW 2024-11-07 - Laserfiche WebLink

• • 16 of 23 Project Number: Plan Name: Sheet Number: 5230503-1XR 216 73rd St SW Everett a ( Engineer: Subject: Date: IT 26"Unreinforced Conc Beam 7/13/23 DEMAND CALCULATION number of stories II 1 stories span L 7.0 ft [max on-center pile spacing] concrete area A 216 in2 *see attached concrete self weight SW 225 plf [Includes total height w/o ACI14§14.5.1.7 redux] w DL DL 465 plf [1-story loading] w LL LL 400 plf [1-story loading] w LLr LLr 325 plf [1-story loading] •'Assuming a single span between 2 piles-in reality continuous spans between piles will have reduced moments** moment from DL Mot 4,226 lb-ft 50.7 k-in moment from LL MIL 2,450 lb-ft 29.4 k-in M =ewt' moment from Sc Ma, 1,991 lb-ft 23.9 k-in shear from DL VOL 2,415 lb 2.42 k shear from LL VLL 1,400 lb 1.40 k Kn.,=ZwL shear from SL VLL, 1,138 lb 1.14 k factored moment MLaro 71.0 k-in 1.4DL MU. 119.8 k-in 1.2DL+1.6LL+0.5SL Mtaro 128.5 k-in 1.201+1.6SL+LL controlling factored moment M„ 128.5 k-in factored shear Vtaro 3.4k 1.4DL V,, 0 5.7k 1.2DL+1.6LL+0.5SL VLaro 6.1 k 1.2DL+1.6SL+LL controlling factored shear V„ 6.1 k controlling factored bearing B„ 6.1 k Bm =Vmax STRENGTH CALCULATION concrete strength f'c 2.5 ksi assumed light art concrete mod.factor 1 1 normal weight concrete flexure strength red.factor 43tir, 0.6 ACI 318-14[Table 21.2.1] shear strength red.factor (I)shear 0.6 ACI 318-14[Table 21.2.1] bearing strength red.factor tbb,.aN„g 0.6 ACI 318-14[Table 21.2.1] 'Note that per ACI 318-14 Ch.27.3.2 a phi/actor of 0.8 can be used if dimensions and material properties are confirmed. moment of ineritia I„ 11,016 in4 *see attached elastic section modulus 5,n 1,001 in3 *see attached tens fiber to NA c 13.0 in "see attached nom flexure strength IT controls) Mn 250.3 k-in Mn=5x�5m CONTROLS ACI 318-14[Eq.14.5.2.1a] nom flexure strength(C controls) Mn 2,127.1 k-in ,.y„-o.85f;•S-, ACI 318-14[Eq.14.5.2.1b[ RESIDENTIAL CONCRETE Mn 375.4 k-in Mn=7.55ASn, X ACI 332-14[Eq.8.2.1.1] -not utilized . flexure strength 4,M„ 150.2 k-in >Mu OK I D/C=85.57% nom shear strength V 14.4 k V .;a J 1' a A AC114[Table 14.5.5.1(a)] shear strength tbv„ 8.6 k >vu OK D/C=70.81% loaded bearing area AI 74 in2 [IDEAL 2-7/8"Tru-Force Underpinning Bracket] supporting surface bearing area A2 74 in2 [If the supporting surface is>than loaded area] nom bearing strength B„ 156.6 k 0.85/1'.1, ACI14[Table 14.5.6.1(c)] bearing strength OR. 94.0 k >Bu OK D/C=6.51% Additional Verification Calc: max concrete tensile strength f, 375 psi f=7.54K ACI 318-14[Eq.19.2.3.1] max beam tensile stress F, 152 psi (Mn c) Fe= lIu f, >Ft OK 1