1111 CRAFTSMAN WAY 2016-01-01 MF Import

�I 1 � and replacemcnt of thc upper l foot of on-site soils, or as represented by the gcotechnical engincer, sliould be accomplished. STRUCTURAL FILL All fill placed on the site should bc placed and compacted as structural �ll after the site preparatiun work is completcd. The fill should be placed in horizontal lifts not exceeding 10 inches in loose thicl:ness or that necessary to oUtain the specified compaction with the equipment used. Each IiR mus[ be thoroughly and uniformly compacted. All structural fill material should bc free of organic matter, debns, and other deletcrious matcri�L Thc maximum particic size diameter should be thc Icsser of cithcr 5 inches or onc half of thc loose IiR thickness. �Ve recommend that all swctural fill placed in building areas or within 2 feet of pa��emen[ sub6�ade bc cumpacted to at least 95 percent of IvIDD as determined by the AS1'M D 1�57 test procedure. E3eto�� the upper 2 feet in pavement arcas, ��e recommend that structural till be compacted [o at Iwst 90 percent of dic MDD. r�s the amount of fines (matcrial passing thc U.S. No. 200 sievc) incrcases in a soil, it becomcs morc sensitiac to small changes ir. moiswre content and during �act conditions, adequate compaction becomes morc difficult to achieve. Generally, soils containing more than about 5 percent fines by ��eight cannot be properly compacted whcn thc moisture content is morc than a fca� percent from optimum. Ne rccommcnd that dic pa��cmcnt and building subUasc consist of a sc!act import fill as prc��iously rccommended. Suflicient eanh��urk monitoring and a sufficient number of in-place density tcsts should be perfornied to ! evaluate fill placement and compaction operations and to confirni that thc required compaction is bcing achieved. SHALLOW FOUNDATIONS �Vc recommend that footings supported on a minimum two-foot thickness of structural till be dcsigncd using an allowable soil bearing pressure of 2,000 pst�(pounJs per square foo[) for dead plus long-term li��e loads. This v�lue may be incrcased by one-third �chen considering carthquake or wind loads. 'fhc structural till zone should also extend at Icast 12 inches beyond [he edgcs of the lootings for each IZ inches of excavation depth. All exlerior footings should be founded at least 1S inches below the lowest adjacent finishcd grade, while interior footings can be (ounded a minimum of 12 inches below top of slab. �Ve recommend minimum (ootinb �vidths of iS inches and 3 Fect for continuous and isolated column (ootings,respectivcly. �Vc rccommcnd that the condition of all footing escavations be observed by a representa[ive of'our firm prior to placement of concrete to confirm that the bearing soils are undisturbed and are consistent with the recommendations contained within this report. 1Ve estimate postconstruction foundation settlements of % to I'/� inches for the assumed loading conditions. �Ve recommend that the strucmre be designcd to tolerate at least 1 inch of ditTerential settlement behveen aJjacent column footings to allow for any variability in subsurface conditions and historical loading at the site. \Ve can providc detailed recommendations for preloading if it is desired ro prc-induce the anticipated setdement at the site. l�ifrA'u. /165b00P00 PagC�l �iEOENGINEEN� A'nrem6rr 6.1006