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i <br /> CAPILLARY BREAK �� <br /> � 18� MIN. OF PEA GRAVEL I � <br /> SLOPE OUTSIDE GRADE \ <br /> AWAY FIIOM g1RUCTURE \ <br /> FOR DRAINA6E —� V4POR BARRIER � <br /> � I+.y, PLASTIC SMEETIN6� <br /> �o � ���// i // . . . .�,� �� <br /> �AVEMEN T � I//i i o• ' :� '•'. e.!'• • �—• � <br /> 10 INCMES MIN. / � � I/ �.e' ' � . !� : SlOPEO TO DRAIN <br /> OR IM�EIEIYIOUS SOIL � � / . ./ ' o' ;. � '��•;r!.' , I <br /> / � :�. : . � . . I <br /> ' • ' - • " ! <br /> � ' �� ORAINA6E f <br /> •',�� . a...o �'� ,' •.•, ' , � -. <br /> ; � .- ... �, .�� ' o`. ' •- . SAND i GRAVEL � <br /> . � .s 1 . SPREIID OR �� ' � � � <br /> ' �/��;�� CONTINUOUS WEEP NOLES � <br /> SUlDRAIN PIPE •�z.•'. . ',,. � . FOOTING <br /> MATERiALS <br /> � �arEs f <br /> 1. Drainage Sand & Gravel Inside <br /> SUBDRALN PIPE Stem Walls Should Be Connected <br /> 4":VIinimum Dia. Perforated Or Slotted Hydraulically To Subdrain Pipe. <br /> Cor�rete, Metal, Asbestos-Cement Or Use Of 2" Dia. Weep Holes Is <br /> Plt itic Pipe. Tight Jointed, Sloped 'fo One Applicable Method. <br /> Drain (4"/100� min, slooe), With Z, gubdrain Pipe Should Be Bedded I <br /> Clean-Outs, With A Minimum Of 2" Of Drainaqe ' <br /> Slotted Pipe-- 1/3" Max, Width Slo:s gand & Gravel Surrounding The <br /> Perforated Pipe-- 3/16" to 3/8" Holes pipe. <br /> 51ote Or Perfcrationa Preferientially <br /> In Lower Half Of Pipe With Lower 3. Backfill Within 18" Of Wall Should <br /> Quarter Segment Solid For Water Flow. <br /> Be Compacted With Hand-Ope;-ated <br /> DRAINA�,`E SAND & GRAVEL L• quipment. Aeaw Equipment Should <br /> To Meet Washington State 3pecifications v�t Be Used For Backfill, Aa Such <br /> Or The Following Gradation. �Peration Could Increase Lateral <br /> Farth Presaures And Possibly <br /> �eve Size Passin B Wei ht Damage The Wall. <br /> 1-1r2�r - - - �100_ _ g _ <br /> 3/4" 70-y0 4. Ali Backfill Should Be Placed In <br /> ./4" 30-60 Layers Not Exceeding 6" i.,00se <br /> Ivo. 8 20-50 Thickness And Densely Compacted. <br /> Beneath Paved Or Sidewalk Areas. <br /> No. 30 8-30 Compact To At Least y5% Modified <br /> No. 50 3-12 proctor Maximum Density (ASTM: <br /> No. 200 0-1. 2 D1557, Niethod C). Otherwise <br /> (by wet sieving) (non-plastic) Compact To 90% Minimum. <br /> SUBDRAIN & BACKFILL SCHEME <br /> SHALLOW FOOTINGS 3 STEM WALLS <br /> S-1 <br />