315 RIVERSIDE RD 2018-01-01 MF Import

IGeotechnical Engineeriug G/� ''�ation � /t� Motor Trucks Intemational L .�crsliip L'verett, Washington � January 4,2005 NGA Pilc No. 774007 � Pagc 10 �i Lateral loads may bc resisted Uy friction on the base of the footing and passive resistance against the ii subsurface portions of the foundation. A coefficient oP friction of 03� for granular structural fill ; subgrade may be used to calculate the base friction and should be applied to the vertical dcad load only. Passive resistancc may be calculatcd as a triangular equivalent iluid pressure distribution. An equivalcni � iluid density of 250 pounds per cubic foot(pc�for tlie competent structural fill should be used for passi��e resistance design for a level ground surfacc adjacent to Lie footing. This level surface sliould extend a distance equnl to at Icnst ihrec times thc footing depth. Thesc mcommended valucs incorporate safery factors of I.5 mid 2A applicd to thc es�imatcd ultimntc v�lues for Gictional and passive resistancc, respectively. To achieve this value of passivc resistance, the foundations slioidd be poured "neat"ar�ainst tlie structural fill. Ne rccommend ihat the upper sis inclics of soil be neglccted ��hen calculating the � passivc resislancc. Structur:il Fill General: Pill placed bencaih liwud.uions, paecmenl, or other seulement-scnsitive structures should be placcd as structural fill. Struclurnl fill,by dcfinition, is placed in accordance with prescribcd methods and standards, and is monitorecl by an experienced geotechnical professional or soils techniciun. l'ield mrniitoring procedures would include the perfann�nce of a representative numUer of in-place densiry tests to document the attainmcnt of Ihe desircd degree of relative compaction. 'fhe arca to receive the fill should bc suitably prepared as describcd in the Site Preparation :md Gracline subsection prior to beginning lill placement. �laterials: Structur:d till shoulJ consist of a �ood yu;�lih�, granidar soil, frec of organics and other delderiuus malerial and be ��'ell gr�dcd to a masimum size of about threc inches. All-��cather fill should contaiu no morc tlian fivaperccnt fincs (soil finer than U.S. \o. 200 sie��c, based on that fraction passing the U.S. 3/4-inch sic��c). 'I'hc usc of on-site soils as stivctural fill is not rccommended. Ne shauld bc rctained to evaluate proposed structural fill material prior to consu'uction. Fill Placement: Pollo��ing suberade preparation, placement of structural fill may procced. All filling should be accomplished in unifonn lilis up to cight inchcs thick. L'ach lifl should be sprcad evenly and be thoroughly comp�eted prior to plxement of subsequent lifls. All strucu�ral fill underlying building areas and pa��cment subgrade should bc compactcd to a minimum of 9> perceut of its maximum dry density. NELS �' ON GEOTECHN/CAL ASSOC/ATES, /NC. �� 'I 2