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� <br /> � <br /> t�n,un�m�alcr �v�u i�hsrrvcJ :tl�ow : �cct hcl����- Ihr cxititin:• i�rouu,i �miacc in boring H-6. �I�hc .�rniraci��t <br /> � slwuld bc prcparcd Iu haudlc givund�enidi >ccp:i;�c. it cnwimlcicd. <br /> F�undation Settlement <br /> � No cslima�c that lhc pos�-cuusuliction scidcmcut of foolings ibundeJ a� rccommcudi�d ahovc ���ill hc Icv� <br /> than I inch. Differential settlemeni hrt�cecn comparably loaded column I'ootiugs or along a 2S-;boi <br /> section of continuous w:dl footing should bc less than S4 inch. N�c uxpect most of tlie footing seitlements <br /> � will occur �is loads arc applicd. Luou ur dis�urbcd soilt nut ninovcd Gom footinE�. excavations prior �o <br /> placing concrcic will resuh in addilional scidcmem. <br /> Lateral Rosistance <br /> � I.;�tcrnl loads can bc resistcd by pas ivc resistancc on ihc sidcs of ihc fuulinEts and hy frictiun on ihc basc <br /> of thc footings. Passivc resistaucc shoulJ bc evalu;itcd using au cyuivalcN fluid dcnsity uf:50 powids <br /> � per cubic foot(pcf) where footings are poured nca� againsi n;uive soil or are surrounded by strucwral f ill <br /> compac�ed to at Ieasl 95 percent of MDD, a, recomn�ended. Resislance to passive pressure shoulJ Lc <br /> calculatcd fi'om thc bottom of adj:icent floor slabs 811(I E)OVIIIb Uf I1CI0\V 8 (IC�III] OP I POOI where thc <br /> adjacent arca is unpaved, as appropriate. �riction�il rcsistance can be evaluated using 035 for thc <br /> � cocfticicnl of hasc frictiun ngainsi footings. '17�c abcrvc ��alucs iucoiporatc a fnctur of safcry of aboul 1.5. <br /> If soils aJjacenl lo footings mc disturbcJ during constniclion. lhc disturbcd soils must hc recump;�cicd. <br /> � olhcnvisc tlie lalcral passivc icsisumcc valuc nnisl bc reduccd. <br /> Constructlon Considerations <br /> � Inuncdialcly prior �o pl�ciug cuncrctr, all dcbri� aud loosc soils that accumulalyd in thc fuotiug, <br /> cscavations dwing fonning and siccl pl�iccment nms� bc rcmovcd. Ucbris or lousc soils nm rcmovcd <br /> liom�hc footing cxca��atiaus�vill result iu increascd sciUcmcm. <br /> � If�ve� wauher conslruction is planned,�ti�e rocommend that all fouting subgrades be proiccted using a Ie:m <br /> conactc nnid mat. '11ic muJ mat shoidd bc placcJ U�e samc Jay tliai thc fooiing suhgradc is cscavaial <br /> ;��,a;,i,pr����d t�� r�,����dalion suppon. <br /> ` We recommend tlial all compleled toolin�exca�;�tions be observed by a represenintive of our finn priur <br /> �u placiug mud mal, reiutbrcing sleel. and sinicturnl concreta Our represemativc will confinn that thc <br /> I bcaring surfncc hns bcen prcparcd in a wanncr consislcnt ��ilh uur recunuucnJoliuns aucl tlia� Ihc <br /> subsurlacc conditions are xs expected. <br /> FOOTING DRAINS <br /> ( Wc rccommcnd perimcicr I'outing drains bc installeJ arounJ thc building. "Il�c perimclur drains should bc <br /> � inslalled at the basc of Ihc cxlerior footings. "1'I�c perimctcr Ji.�ins sltould be provided with deanouls and <br /> should consist of at Icast �t-inch-di:unctcr perforatcd pipc pinced ou a 4-inch bcd uf, xnc; surroundcd hy. <br /> i 6 iuchcs of drainagc matcrial encloscd in a non-wovcn gco�cxlilc idbri .,,,cn as �9irafi 140N(or approvcd <br /> equivalent) to prevcnt finc soil from migraling into the Jraim m�terial,as sliowu on I�igure 3. 'llic footing <br /> drain pipe should hc insiallcd ot leas� 18 inchcs bclow the top of thc adj�cent floor slau. 'Ihe drainaLtc <br /> I matcr'.a; should consist of �vasLcd 3/ti-inch tu No. 8 pr.i gr.rvcl or "Gravel 13ack�11 for Urains" per <br /> Sec�iun 9-0;.1 Z(�i)of Ilic 2006\VSDOT Stmidard Specitications. Wc recommend the drainpipe consisl ol <br /> cithcn c�;rvy-��all solid pipc (SDK-35 PVC, or cqual) or rigiJ con'ugalcd smooth intcrior polyclhylenc <br /> pi��c(ADS N-I�', or equall. �4c ;dsu rccnmmend againsl using Ilexible tubing for tiwling dr:iinpipes. 'I�hc <br /> I <br /> �� � - _ __ -- _ _ ----- -- - ----- <br /> ( 1', ��,.nd'-nu Pn�,ic U GEOENGINEERS� <br /> f �l� <br /> I <br />