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filabal&utility�xeawttinrts, <br /> )used.on the composition.anti consistency of the site soils,stable slope cuts to provide adequate <br /> global stability can be steeper than WSHA standards in areas that are not considered confined <br /> spaces. Excavations into the native glacial till soils on the site that will not result in WSHA <br /> regulated vontined spaces-can be cut to 0.11 inclination of:0.5:1. Some raveling of the gravel and <br /> cobbles exposed on the slope surface may occur at all inclination of 0.5:1. Dud to the potential <br /> for raveling to occur,and'to provent erosion,the slope:face should be covered with durable plastic <br /> sheeting. <br /> This information is provided solely for the benefit of the owner and other design consultants, and <br /> should not bo construed to imply that Ages, Engineering,.LLC assurnes responsibility for job site <br /> safety. It is understood that job site safety is the sole responsibility of the project contractor. <br /> 5A4 Foundatiionrs <br /> The new residential foundation may be supported on conventional spread footing foundations <br /> bearing on the competent native organic-free sails or on structural fills placed atova tlreso native <br /> soils. Foundation subgrades ,should be.prepared as recommended in the"Site Preparation and <br /> Grading" section of this report. As discussed in the "She Preparation-and Grading" section of <br /> this report,the existing.Ell observed iri the upper 3.0 to.4.0 feet of the site is in a loose condition <br /> and contains enough organics that it will not be suitable for support of new foundations. Prior to <br /> construction these tinsuitable soils should be removed from under now foundation areas. <br /> Perimeter foundations exposed.to the weather should bear at a minimum depth.of 1.5 feet below <br /> final exterior. grades for frost protection. interior foundations can. be constructed at any <br /> convenient depth below the floor. slab. We, reconrrnend designing new foundations for a net <br /> allowable bearing capacity of 2,500 pounds,per square toot(psb, For short-terns loads, such as <br /> wind and seismic, a one-third increase in this allowable capacity can. be used. With the <br /> anticipated loads and this bearing stress applkd, building settlements should be less than one-half <br /> inch total and one-quarter inch differential. <br /> I For designing foundations to-n-sist..lateral loads, a base friction coefficient of 0.35 can.be used. <br /> Passive earth pressures acting on the sides of the footings can also be considered. We <br /> recommend calculating this lateral resistance-using;.air equivalent fluid weight of 350 pounds per <br /> cubic foot (peo. We recormnend not: including tine upper 12 inches of soil in this computation <br /> E; <br /> j bei art a it can:be affected by-weather or disturbed by-attire grading activity. This value:assumes <br /> I the t'aundations will be constructed treat against competent soil and backfilled with structural fill, <br /> as described. in the "Site Preparation, and Grading" section of this report. Tile valuers <br /> recommended include a safety factor of 1.5. <br /> I <br /> x <br /> Page 9 <br /> Aggo.F.ngincerinr;.LLC <br />( 253-84i-iW4 <br />