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_ _ <br /> SLOPE OUTSIOE GRADE <br /> CONCRETE SAND� <br /> � AWAY FROM STRUCTURE � <br /> FOR DRAINAGE � FL OOR S L AB <br /> I � - . �a��.r'• ;+•. ^'� <br /> /S— -.�e_ •� � � o . . ,.. . � '�`. ..'V� �\ <br /> � ` G // �/ / / � i. ' _r.o�- �.i o'i�_ ` -p . <br /> . i . ,".,_ ' :1 ' � , 1 <br /> PAVEMENT OR , � � � � � � '�� ' � <br /> 10 INCHES MIN. ' �% / /�� '�•'��;'� VpP.OP BARRIER� <br /> OF TAMPED TOPSOIrr /�j .%. � _- � `�'•'� ppAINAGE <br /> i OR IMPERVIOUS SOIL — ;�, _ <br /> '� ',� i SAND d GRAVEL <br /> , . <br /> . �'a• _ .o:' . <br /> j —.o . <br /> � '� • � .` SPREAD OR � `- WEEP HOLES <br /> I �• � •�'"a: CONTINUOUS <br /> SUBDRAIN PIPE -'; e•�:�. ._,•. ��: FOOTING - <br /> � , i .. , <br /> 1 not lo scale <br /> ! VIATERI�LS . :iOTES <br /> 1 Drainage Sand & Gravei Beneath <br /> i �UBDRALN PIPE Floor Slab Should Be Connecced <br /> 1 4" iVIinimum Dia. Perforated Or Siotted Hydraulically To Subdrain Pioe. <br /> Concrete, :�Ietal, Asbestos-Cement Or Use Of 2" Dia. Weep I-Iole= Is <br /> I P!astic Pipe. Tight Jointed, aloped To One �pplicable l4ethod. <br /> D:ain (4"/ 100' min. slope), With <br /> C!ean-Outs. '?, Subdrain Pipe Should Be Bedded <br /> j Slotted Pipe-- 1/S" �iax. Width Slot� WLth � iVlinimum Of 2" Of D.ain:ge <br /> 1 Perforated Pipe--3%16" to 3/8" Holes Sand & Gravel �urrou:id?ng The <br /> �!ots Or Pe^ iorations Preferentially Pioe. <br /> 1 In Lower H=1f Of Pipe With Lower <br /> Quarter Segment Solid For Water Flow. 3. Bacl;_fill �Vithin 18" Oi Wa!i ��o�11�j <br /> Be Compacted With Hand-Onerated <br /> � DRAiNAGE SAND & GRAVEL rquipment. Heavy Equiomer.t 3houid <br /> To ;Vleet Washington State 5pecifications vot Be Used For Bac:l:.`ili, ��s Such <br /> Or The Following Gradation. Operation Could Increase L�ceral <br /> � Farth Pressures And Possibly <br /> Sieve Size Passing By Wei�ht Damage The Wall. <br /> i-1/2" 100 <br /> 1 3/4" 70-90 4, all Backfill Should Be Ylaced In <br /> 1/4" 30-60 Layers Not Exceeding 6" Loose <br /> � No. 8 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 95% �iodified <br /> � No. 200 0- 1. 2 Proctor Maximum Der.sity (ASTM: <br /> (by wet sieving) (non-plastic) D1557, Method C). Otherwise <br /> , Compact To 90% Minimum. <br /> 1 <br /> , SUBDRAIN & BACKFILL SCHEME <br /> ISHALLOW FOOTIk �� S 4VITH INTERIOR SLAB ON GRADE S_� <br />