2001 W MUKILTEO BLVD 2016-01-01 MF Import

t LPropoxd McCabe Residence Remodel Everett, Weshington � ProjectNo.6(3-9701022 � Page 11 Coatinuow or column footings caet atop at least mcdium-deaee astive soils encountatid �t s depth of about 4 to 7 fat below e�isting g�ade or stnwtural fill placed ova t6e mediusn dease mtive soil and compected W a minimum of 90 percent of the modiSed Proctor meximum dry deasity may be designed for a ewcimum ellowable beacing pre�ae of 2,500 p�f. A one-t6ird i�rease of t6ae beuinQ pressures may be uxd for s6oK-tenn dynamic loads auch �s wind and seismic forces. In tieu of extending the foundatioos down W the mediwn dense native soil�, the loose, aear- surface soils e�couataed at the anticipated fo�mdation bearing grade could be overcxcavated to a depth of 4 to 7 fcet below exi�ting g�ude and rxon►p�coed. Prm'ided the moisture content petmite. or retnoved end replacxd with pit-nm send and �avel fill. The ova+excavation should also extend laoerally eway from each side of the founda6oa a distence equal to tl�e depth of the overexcavation and beckfillcd with compected structural fill. Controlled density fill {60t psi min.) bacrfill may be uxd in ve[tical excavetions below the a►tire fo�u�da6on width a+ m altemste W help limit lateral overexcavetion rcquired witl► soil beckfill. �� „ �� ; ,� �,� �� .,� �� . , � The local building code is understood to req�tire n minimum 18 inch foundstion embedment depth; therefore, a minimum embedment depth of 18 inches below the finished exterior gtade is recommended for perimeter footings. Interior footings ahould be placed at leavt 12 ine6e� betow the floor slab within heatcd poRions of the building. All footings must be protecte� egainst weather dert�ege both during and after construc6on, and must be suppotted by suitable bearing tmtecials as eecotnnxnded herein. FafimaMvl Seklement It is estimated that the total settlement of foundadon members founded within the above mentioned soils may approech 1 inch. Differential xttiement of foundadons founded witlun the aeme soil type could approximate one-half of the total settlement If possible, it is recommended thet the foundadon elements be placed within the seme soil type to minimize the magnitude of possible differontial setdement. It should be noted that differential settlement could approech tlx Wtal xtUement values if adjacent footings are founded on different beazing strata Foundation settlement is oftentimes the function of the condit'on of the footing excavation subgrade. Footing excavaGons should be free of loose or soft soil, sloush, debris or water prior W pouring concate. If dishulxd or soR soils are left beneath the foodng area prior to conerote placement, future settlements may be greatly increased. For that reavon, it is rxommended that the footing subgrade soils be observed by a representative of Grles prior to pouring footing concrote to document that the condidon of the bearing soils is consistent with the recommendadons contained in ihis report.