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f <br /> i <br /> �CIObCi 1�,��1� <br /> Nfr.IIar�'ey JuUie <br /> L&A Job No. 11-064 <br /> Pagc 14 <br /> SLAI3-ON-CRADE FLOURti <br /> Slah-on-gradc floors, if used, should be placed on �imi subgrade snils prcparcd us outlined in the <br /> Site Yrcp�r�tion and General Gradink and the Stnictural Pill sections uf this report. Whcre <br /> moisture control is critical, dtc slnb-on-grade floors should be pourcd on a capillaty hreuk ��hich <br /> is in turn placcd on the compacted subgradc soils. Tl�c cupillary hreak should consist of u <br /> mi�umum four-inch-thick la�•er of 1'ree-Jraining gravel or cruslied rack cuntaining no ntorc thtm <br /> $�,� b,� �veigh� passing tlie No. d sie��e. \'1'c rccouuncnd dtut a vapor harrier, sucli as a 6-mil <br /> plastic mcmbrane, he pla�ed o�•ct tlie capillarv break to kecp moisture Siom migratins up�vu'ds. <br /> llKiVL�VAY PAVE,�NT <br /> Perlorm:uuc of dri��ewa)' pn�'ement is �ritic��ly related to the conditions uf the undcrlying <br /> subgrade soils. \Vc reconunend tliat thc subgrade soils under tlie road�r•ay be treuted and <br /> prep�red as dcscribed in the Sitc Yrcutuation und Cicuctal Gradin�section of diis rcpor�• Prior to <br /> placing the basc material, the subgrade soils, uller stripping of surticial unsuitable soils, should <br /> Ue compactcd ro ti non-yiclding sts�te ��ith a mecha�iical compactor and proof-rolled ���ith a picce <br /> of hea���• amscruction equipmen[. such as n full}�-luaJed dump truck. An�• arcas ��•ith excessive <br /> Ile�ing or pumping should bc ovcr-excuvuted and re-compacted or replaced �vidi a structural lill <br /> or cn�slied rock placed and cotupucteJ in accurdance �eidi die reconunendations provided in the <br /> Structural Fill Scction of this report. <br /> �1'e rcconuucnd thait u layer of 4-inch-duck miuimum, cumpacted, crushed rock base (CRN) of <br /> 71S-inch-minus cruslicd rock, be used t'or tl�e drive�vay arca. Tlic crushed rock base should bc <br /> toppcd ���ith 3-inch-thick Ciass B asphalt concrete (r�,C) or 4-inch concrete pavcmcut reintoreeJ <br /> �tiyt�l �� ���er o�' wei�led ��•irc fabric at the ntid-depth ol the pavement. The drire«•a}� pavement <br /> LiU & ASSUCIATES, INC. <br /> i��� � � <br /> / <br />