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r <br /> SHANNON F�WILSON,INC. <br /> I <br /> ► The bacl�ll prwiding resistance is structura1811 compacted W at least 95 percent <br /> ' of its Modified Proctor maximum dry densiry (ASTM D 155'n. <br /> ► The ground surface adjacent to the wsll or footing is horiwntal in the direction of <br /> movement to a distance equal to at least twice the embedment depth. A reduced <br /> � EFP should be used if the ground slopes downwards away from the structure, <br /> which we can prwide if nacessary. <br /> I I <br /> ► T'he ground providing the msistance is paved. Passive msistance should be <br /> ignored in the upper 12 inches if not cwered by a pavement and should be <br /> + ignored en6rely if a possibility acists that soils providing the resistance could be <br /> � remwed in the future. <br /> � An ul6mate coefficient of fricdon value of 0.65 may be used to �:.^.a;aie resistance to ' <br /> sliding. This value assumes cast-in-place concrete placed direcfly on till-like soils or <br /> granulaz structural fi1L A factor-of-safety of at least 1.5 should be used in evaluadng the <br /> resistance to sliding. <br /> � It is assumed that the seismic design of the proposed structure will be based on the 1991 <br /> I Unif'orm Building Code (UBC). In accordance with the UBC design procedures, Uie site <br /> coefficient for soil characteristics is SZ, with a corresponding S factor of 1.2. <br /> I8.7 Floor Slab �y,R,00rt <br /> Slab-on-grade floors, either supported on properly prepared native subgrade soils or on I <br /> structucal fill placed on these soiis, may be used. Site prepua6on and grading in floor slab <br /> iareas should conform to the recommendations provided in Section 8.4 of this report. Floor <br /> slabs should be underlain by at least 6 inches of select granular Sll and/or clean sand to act <br /> I as a capillary break and to pravide uniform subgrade support. A moisture vapor barrier <br /> may be used, if desired. <br /> ( 8.8 Arainaee <br /> IBecause some of the excavadons to constmct the building pads will be deep, it is our � <br /> opinion that there is the possibility of encountering significant quan6des of pe�hed <br /> Igrounduatr.r. The effect of this water would likely be worse during construction and the <br /> first few years following conswction, with condidons grddually readjusfing to the new <br /> � W-6693-01 <br /> 25 <br /> ( <br /> I <br />