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G <br />�ir, James Gallo���ay <br />` September C, 201 1 <br />For designing foundations �o resist ]ateral loads, a base friction coefficient of 0.'?5 can be used. Passive eartlt <br />pressures acting on the side of� the foatin� can als� he considered. �Ve recomzllend ca[culalin� this lateral <br />resistance usint� an equivalent fli�id �vei�,ht of 350 pouncls per cubic ft�ot (��c�. �t�e recomz»end not includin� the <br />upper 12 inches of soil in this �omputation hecause it can he �f�fected by weather or disturbed by tuture ��radinc <br />activity. Tl�is value assumes the f��undatic�n �vitl bc c�nstructcd ne.at against competent ilative soi] or backfilled <br />with structural �ill as de5crihed in lhc Structural rill Sectian «f this rcp�rt. 'I'he friction and passive values <br />recomiliended include a safery fact�r of� 1.5. <br />Slxb-on-Grade Construction <br />/�s «�e understand, the �utaclave Yloor slab �vill be a 12-inch tliick SII'l1CIUf8� Slilb. FOi l;VBIU£]I[[l�t* perfoilriaiice c�i' <br />tfle slab undei� tl�e antieipated Ie�adin!�, providcd the suh�rade is tinn and stable and cansists af native }*ranular soil <br />or structural till, a subti�rade moclulu, ��f 3Qfl (k,) of 30U pcwnds per cubic inch (pci} can be used. <br />Imn�ediately belo�v the slab, we recornmend placing a fc�ur-incli thick capillary break la�1er of clev�, free-di-�inin� <br />coarse s<�nd or {ine 17ravel Iliat has iess Ihan Cvc percent passinc tl7e No. ?00 sieve. This material wiIl reduce the <br />�atential fo�� uptivard capillary n�o��ement of water tlirou�*h th� underlying soil and subsequent «�etting of the floor <br />slab. <br />\�'here moisttire by va�or lransnlission is undesirable, u�e sug�est placin�� a durable plastic membrane over the <br />capilEary break material. The membrane should he seale;d at the building perimeter ���ith joints at�erlapped a <br />rninimum of�six inches and taped or glued. 'To protect thc i��embrane trom daFna�e durin�! constiuction and to aid <br />in u��iform curin�.: of the tloor �lab, we sug�est covcrin�; the il�emhrane �vith t�vo inches af capillary break <br />material. <br />Surface Draina�e <br />Surfacc water runol�f ti-om tlir buildin�� must nc�t be alla�ved to ilo«� unconirolled over the crest of thc slopc. <br />Surtaee �}�ater sh�uld be direeted away from the slc�pc: er�st to �i point of� ec�llection and eontrolled disehar�e. 'l�he <br />existing yard drain t�rill necd to be relocatccl outside of�the adclition and re-estahlisheci �o contmi ninof�fand direct <br />it to the stortli drainake facilities. <br />If site ��rades do not allo«� for directin� surtace ���atcr a«�ay from the slopes, the tivater shou[d be caliected ��nd <br />ti�htlined down the slope face in a controlled mai�ner. <br />LIti11TATIONS <br />This report is the copyrighted praperty of 'rcc-ra A,sociates, inc. and t;�as prepared in accordance �vith generally <br />accepted geotechnical en`�ineering practiccs. `I�his re���i�t is intend�d for specific appiication to the Propo;ed <br />AutocIave Addition, Intec racilitv, and t��r the exclusive use of Integrated Technolo�,ies, Inc. and tl�eir authorized <br />representatives. N� other warranty, expressed or implied, i� �nade. <br />Project 1��0. T-ti�17 i -? <br />Page No. 6 <br />