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<br />93 <br /> <br />--f <br /> <br />A, BUILDING MODEL, DIMENSIONS, AND LOADING <br />MODELING Extl~r1~r ~lal1 studs <br />/ . <br /> <br />t- <br />V <br /> <br /> <br />"t <br /> <br />.,..... Floor <br />joist <br /> <br />ExterIor grade ~ <br /> <br />Hydrostatic pressure__ <br />distributIon from an <br />"equivalent fluId" <br />design PH <br /> <br />a <br /> <br />8' <br /> <br />;,.....- Basement <br />" ~ slab <br />'\ <br />..... <br />Foot I ng <br /> <br />B, STRUCTURAL ANALYSIS MDDEL (WALL) <br /> <br />s "". 8' - 2" <br /> <br />_. Pu a2 <br />Mu-~ <br /> <br />(~ + ~a M'3') <br /> <br />LOADED BEAM <br /> <br />Where: <br /> <br /> <br />a '" Height of soil/water loading (it. j <br /> <br />P ~, <br /> <br />S a Design span length for simply <br />supported beam (wall) (ft.) <br /> <br />b - s - a (ft.) <br /> <br />b <br /> <br />~~ <br /> <br />a <br /> <br />s <br /> <br />.. <br />I <br />I <br />-j <br /> <br />8' 3 Height from bottom of basement ~;l,-,b <br />to bottom of floor joist (ft.) <br /> <br />~ <br /> <br />MU - <br /> <br />Ultimate bending moment caused by <br />triangular (hydrostatic) loadin9 <br />Pu (ft.-lb.) <br /> <br />PH <br /> <br />'" Lateral wall pressure at top of <br />footing, equal to y u x a (lb./it.L <br />or lb./it. per lineal ft. of wall) <br /> <br />~ <br /> <br />~ bls (dimensionless) <br /> <br />a <br /> <br />a a/s = 1 - S (dimensionless) <br /> <br />Figure 11.6 Design loading conditions for basement willis. <br />(Reference 26). <br /> <br />Y u c Equivalent fluid uni t weight whi.ch <br />causes Mu (lb./ft.3) <br /> <br />Yw <br /> <br />- Equivalent fluid unit weight for <br />"working load" conditions, equal <br />to Y /U (lb./ft:.3) <br />u <br /> <br />U "" Load factor ... 1. 4 <br /> <br />t a Wall thickness (inches) <br />