1230 MADRONA AVE 2016-01-01 MF Import

April 10, 2005 Proposed Single-Pamily Residence L&A Job No. S;AO] 9 Page 1" tooting trcnches. Disturbed soils in footing trenches should be completely removed down to firm nalive prior to pouring concrete for the footings. IC thc aUovc recommendations arc followed, our rccommended design criteria Cor foating fatmdations arc as 1o11o�vs: • 71�c allowable soil be�ring pressure for faoting foundations, including de�d and livc lo�ds, should bc no greater th.m 2,500 psC The footing bearing soils should be verified on-sitc by a geotechnical engincer aIler ihe footing trenches tue excavated aud before the foolings potued. • The niinimum dcpth to bottom o1'perinictcr foolings below ndjacent final extcrior gradc should bc no Icss than 1R inches. 7'hc minimum dcpth to bottom of ihc intcrior footings bcicnv lop of Iloor slab sl�ould be no less than 12 inches. • 7'he mininnim width should bc no less than I G inches for conlinuous foolings, ,md no Icss ih�m 24 inches Ior individual footings. A one-third incrcase in the above, rccommeuded allo.vable soil bearing pressure nr�y Uc used when considering short-term, trm;siton, wind or seismic loads. Por footing foundations designed mid conslructed per recommcnda(ions abovc, wc cstim�lc tiud thc maximttm lola� post- cousiruction setQement of the buildings should Ue U2 inch or less and the diCferenlial settlement across building �vidth shoulcl bc �/fi inch or less. L�teral loads on build�.• �s c,:n bc resisted bp thc frictio�i force Uehveen the foundations and tl�c subgradc soils or the passive ecu�Ui pressure acting on the below-grade portion of tlie foundations. Por thc laucr, the found.ilions must be poured "neaf' against undishirbed soils or U�ckfilled with a d�an, f'ree-draining, com��acted structural fill. \'�'e recommend that an equi��alent f]uid density (TsPD) of 350 pc1' (��ouuds per cuhic fooQ for thc passi��c earth pressure be used for lateral LIU & ASSOCIATES, INC.