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AWAY F�OM��T�UCTUIIt <br />F011 DIIAINAO� � <br />811 1 �y��YIOUf SO�II <br />fU�D11A1N �I <br />MAT� LS <br />/ <br />�� ���� � <br />ii• .,' • . . ., <br />;.�:�. • <br />...�.. �; , ;:. <br />•;•• ';'f"• '•': <br />.. ... <br />.. . • , .': <br />CAPILLARY /pEAK � <br />Ia` MIN.OF PEA ORAVEI I <br />VAPOR lARq�ER � <br />I�.p, PLASTIC SHEETIN01 <br />.. �.::'. _ <br />. <br />a. ': ^:. e; : <br />.;.••.t`: <br />'e' • �-,�:... <br />_ "�, _! :�.� <br />� � .'�"� .•..: <br />� •� sreE�o oe <br />. .. : <br />�� oNriNuous <br />' �•� i:,�:� FOOTIN� <br />SUBDRA[N PIPE <br />4'r:blinimum Dia, Pertorated Or Slotted <br />Concrete, Metal, Aabertos-Cemeiit Or <br />Pla,u.: � e, Tiaht Jointed, Slopc�d To <br />Drain (4"/1D0� min, elope), With <br />Clean-pnta, <br />Slotted Pipe-- 1/S" Max. Width Sl��ta <br />Pertorated PipF:-- 3/16" to 3/8" H�les <br />51ote Or Perforationa Preferientially <br />[n Lovrer Half Of Pipe With Lower <br />Quarter Segment Solid For Water Flow. <br />DRAINAGE SAND & GRAVEI, <br />To Meet Waahington State Specificationa <br />Or The Following Gradation. <br />�eve Size Pasein oo Weight <br />1-1%2'r _ _ _ <br />3/4" . ?0-y0 <br />1/4" 30-80 <br />No, 8 20-50 <br />No. 30 8-30 <br />No. 50 3-1Z <br />No. Z00 0-1. 2 <br />(by wet sievina) (non-plaetic) <br />... . ;�, ... <br />SLOPED TO ORAIN <br />°s�iio"P an�ve� <br />W[f� MOL[• <br />VOTES <br />1. Drainage Sand & GravelIneide <br />Stem Walls Should Be Connected <br />Hydraulically To Subdrain Pipe, <br />Use Of 2" Dia, Weep Holea [a <br />One Applicable Method. <br />2. Subdrain Pipe ghould Be Bedded <br />With A Minimum Of 2" Of Drainage <br />Sand & Gravel Surrounding The <br />Pipe. <br />3. Backfill Within 18" Ot Wall Should <br />Be Compacted With Ha�d-Operated <br />Equipment. Heavy Equipment 8hould <br />Not Be Uaed For Backfill, Aa Such <br />Operation Could Increaee Lateral <br />Earth Preaeures And Poeeibly <br />Damage The Wa1L <br />4. All Backfill Should He Placed In <br />Layere Not Exceeding tl" Loose <br />Thlckneas And Densely Compacted. <br />Eeneath Paved Or Sidewalk Areas, <br />Compact To At Leaet 8596 Modified <br />Proctor Maximum Denaity (ASTly(; <br />D1S57, Method C). Otherwiae <br />Compact To 90aJe Minimum. <br />SUBDRAIN di BACKFILL <br />SHALLOW FOOTlN(iS d STEM <br />SCHEME <br />WALLS <br />