1725 GRAND AVE 2018-01-02 MF Import

i , . INovember 10, 2000 G-1266 Gillette Residence Page 5 � 5.4 Found�tiona IBased on the dense soil conditions found at the site, the proposed column footings, retaining wall, I and basement wall foundations can use conventionel spread and column footings bearing directly on the dense, native soils or on structural fill placed directly on dense, native soils. Our recommended design criteria for conventional spread footing foundations are as follows: I - Allowable bearing pressure, including all dead and live londs: I Dense native soil =4,000 psf Compacted structural fill =2,000 psf I -Minimum depth of perimeter footing below adjacent final exterior grade= 18 inches - Minimum depth to bottom of interior footings below top of floor slsb= 12 inches -Minimum width of wall footings= 16 inches ( - Minimum lateral dimension of column footings= 24 inches I -Estimated post-conswction settlement = l/4 inch � - Estimated post-consttuction differential settlement; across building width= 1/4 inch � A one-third increase in the above allowable bearing pressures can be used when considering short- term transitory wind or seismic loads. I Lateral loads can also be resisted by friction between the foundation and the supporting compacted fill subgrade or by passive earth pressure acting on the buried portions oi the foundations. For the latter, the foundations must be poured "neat" against the existing undisturbed soil or be backfilled with a compacted fill mceting the requirements for stnrctural 611. - Passive Pressure(Lateral Resistance) • 350 pcf equivalent fluid weight for compacted structural fill • 350 pcf equivalent fluid weight for native dense soil. Geo Group Northwat, Inc. �� �