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C.,STOM DESIGN & ENGINEERING(INC <br /> STRUCTURAL ANALYSIS& DESIGN <br /> MIEMO c�&05-o� w <br /> Date: January 15, 2008 <br /> Reference project: KRUEGER RESIDENCE- BASEMENT WALL DESIGN <br /> Desfgn parameters <br /> y, =1201b/k3 <br /> $=30� <br /> a=0° <br /> µ=0350 <br /> Surcharge,q=0.0 psf <br /> Coefficient of at rest earth pressure <br /> K, =1-sin(�)=1-sin(30.0'�=0.500 <br /> At rest earth pressure <br /> Po =KaY:H=0.500(120.0)(9.0)=540.00 psf <br /> Loads reacting at top&btm <br /> Compute resultant load acting @ H/3 R, = 1/2(P,��H)=1/2(540)(9.0)=2430 Ib/ft/ft <br /> @ Top=1/3(R,)+Q„H/2=1/3(2430.000)+1/2(0.000��9.0)=810 Ib/ft/ft <br /> @ Btm=2/3(Ro)+Q„H/2=2/3(2430.000)+1/2(0.000)(9.0)=1620 Ib/ft/ft <br /> Maximum moment=0.06415(P,�(H)�+q„(H)2/8=0.06415(540)(9.0)�+0.0(9.0)=/8=2806 ft-Ib/ft <br /> Wall reinforcement <br /> Factored shear, V„ =1.7(Reaction @ bottom)=1.7(1620)=27541b/ft <br /> � V� =�(2f��u2bwd) <br /> �=0.85 <br /> f�� =zsoo Pst �R <br /> bw =12.00 in. A <br /> Locate reinforcement with 2 inch cover � �i ��C�O <br /> y ld � . <br /> d=tw(12)-2-bardia/2=0.67(12)-2-1/2=5.54in � � _ <br /> � v� =o.sslz(zseo)'�Z(12.00)(5.54)]=5651 Ibs �' <br /> '� q 36?23 /-� <br /> (�V� =5651 Ib/R)>(V� =2754 Ib/ft) OK �ic1,_ �1STF���� :':;�' <br /> ti1;q��NALG',��*:!.. <br /> Check eending a <br /> M„ = 1.7M, = 1.7(2806)=4770 ft-Ib/k EIfPIRES <br /> Assume jd=d-a/2=0.875d=0.875(5.54)=4.85 in <br /> A, =4770(12)/[0.90(60000)(4.85)] =0.219 inZ/ft <br /> 11006 60T" AVE WEST- MUKILTEO WA 98275 <br /> PHOME (425) 343-7517- FAX (425)493-838E <br /> y3 <br />