4818 BELVEDERE AVE 2016-01-01 MF Import

November 9. 2006 Single-Famil}� Residenec - Bclvedere Lot 4 1,&A Jub No. GAlA9 Pagc 10 •'f'hc minimum depth to bottom of perimetcr footings txlow udjacent finnl exterior grade should bc no less than 18 inche;. 'fhe minimurn depth to bottom of the interior footings below top of iloor slab should be no less ihan 12 inches. • The minimum width should be no Iess than 16 inches for continuous footings, and no Icss !hnn 24 inches for inJividual footings, except lho:.e footings supporting light-weight porchcs or wood dceks. A one-third incre.ue in the above rccummended allowable soil bearing pressure may be used when considcring short-term, transirory, wind or scismic loads. For footing foundations designed aud constructed per tccommcndations above, we estimate thut the maximum total post- construction setQement of the buildings should be 3/4 inch or less and the dit%rential settlement across building width should bc 1/2 inch or Icss. lateral loads on buildings can bc resisted by Ihc friction force betwecn the foundations and the sub6rade soils or the passivc c:vth prcssure acting on the below-grade portion of lhe foundations. �or thc Inner, thc foundations must be poured "ncat" against undisturbcd soils or hackfilled with tf clean, Gce-draining, compactcd structural ftll. Wc rccommend that an equivalent Iluid density (EFD) of 350 pcf (pounds per cubic foot) for the passive earth pressure be used for lateral resistance. Thc abovc passive pressure assumcs that the b�ckslopes of the foundalion walls arc Icvcl vr asccnding away Gom the foundations for a horizontnl distence at Icast twice the depth of thc foundations bclow the fin�l grade. A cocflicicnt of friction of 0.60 between the foundations and their subgradc soils may be uscd for calculating the friction force ro resist lateral load on the foundations. 7'hc above soil parameters ure unfactorcd valucs, and a proper factor of safety should be used in calculating thc resisting tbrces against laterul loads on the baildings. RASGMEINT AND RF.7'AINING WALLS Rnsement walls restrained horizontnlly at the top nre considered unyielding and should be dcsigncd 1'or a lateral soil pressum under the �t-rcst condition; while retaining wnlls free to move LIU & ASSOC[ATES, INC.