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r—�..� —.-r— <br /> � CAPILLARY BREAK <br /> I6� MIN. OF PEA GFiAVEL i <br /> i <br /> � <br /> SLOPE OU'fSIDE GRADE \ <br /> AWAY FRGM STRUCTURE \ <br /> FOH DRAINAGE � VAPOR BARpIER J <br /> I le.g. P�ASTIC SHEETINGI � <br /> t� <br /> � i �� � �/';� � //.%�/ . • . . . . . . . <br /> ` PAVEMENT OR � i i j� / ;' � � � � • ' _' . : .� . :'.���, ' . <br /> 10 INCHES MIN. � �.�% �j � /// ��a'.' � , !� �' SlOPEO •TO DRqIN <br /> OF TAMPED 70PSOIL � •::��,�' <br /> Ofl IMPERVIOUS $OIL �' / ' a . ' <br /> i . � .� �' • _ . : �. _• . <br /> .. � e '.� �, e: <br /> �' 'a •, o � ' � . .'..� '.'. ORAINP;iE <br /> a �a . .'. , . . <br /> ' n .� .. �. o�� �I '••�'�:.` SANU 8 GRAVEL <br /> .�e .o:� '•o'. SPREAD OR '� ' <br /> � ��'� �. ' CON7INUOUS WEEP HOLES <br /> SUBDRAIN PIPE •��.•.. �•� .'�e^ FOOTIHG <br /> �t . .�. . , <br /> � YIATERLALS VOTES <br /> 1. Drainage Sand & Gravel Inside <br /> SUBDRAIN PIPE Stem Walls Should Be Connec;ed <br /> ="�Iinimum Dia, Perforated Or �lotted HydrauLically To 3ubdrain Fipe, <br /> � Concrete, Meta1, Asbestos-Cement Or Use Of 2" Dia. Weep Holes [s <br /> ?lastic Pipe. Tight Jointed, Slooed To One 3pplicable VIethod, <br /> I Drain (4"/100' min. siooe), With Z, gubdrain Pipe ahould Be Bedded <br /> Clean-Outs, <br /> Slotted Pipe-- li 3" NIax. �Vidth Slots W'-� A Vfinimum Of 2" Oi Dra:r±age <br /> Perforated PipF-- 3/16" to 3/8" Holes �and & Gravel Surrour.ding The <br /> ! Slots Or Perforations Preferientiaily Pipe. <br /> I:i Lower Ha1f Of Pipe With Lower <br /> 3. Bac4tfi11 Within 18" Oi Wall Should <br /> 1 Quarter Segment Solid For Water Flow, ge Compacted bV`th Eiand-Operate6 <br /> DRAINAGE SAND & GRAVEL Equipment. Heavy Equipment Should <br /> To YIeet Washington State 3pecifications Vot Be Used For Bzckfill, As Such <br /> � Or The Following Gradation. �peration Could Inc:ease Lateral <br /> Earth Pressures And Possibly <br /> �:ieve Size Passin By Weieht Damage The Wall. <br /> ) i=irz�� - - �oo - - " _ <br /> 3/4" �p_yp a. All Backfill Should Be Placed In <br /> � 1/4" 30-60 Layers Not Exceeding ti" Loose <br /> �o• $ 20-50 Thickness And Densely Compacted, <br /> No. 30 8_30 Beneath Paved Or Sidewalk Areas, <br /> � No. 50 3_12 Compact To At Least y5'/o Modified <br /> No. 200 0_1. � Proctor Maximum Density (ASTM: <br /> (by wet sieving) (non-plastic) D1557, Method C). Otherwise <br /> Compact To 90% Minimum. <br /> � SUBDRAtN & BACKFILL SCHEME <br /> � SHALLOW FOOTINGS & STEM WALLS <br /> � 5- 3 <br />