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:� <br />� <br />� <br />A <br />� <br />M <br />� <br />SIOpE OUTSIDE GRADE <br />FOR rDRA NAGETR�AE <br />FLOOR SLA! <br />CONCRETE SAND <br />�� i'�.��_,�Ot',!.��^ �,�•��• �''• ` <br />.,. .• ':;��'iC_�..�:�:�'��: <br />/ / � : ti�.�� �1�•:�..� • _ , , • <br />PAVEMENT �R / '�: :' !•''' VAVON lA11111E11� <br />10 INCMES IN. /�// /���i -�•j:�•;•:��'' . <br />OF TAMPED TOPSOI / "� =••s . ORAINAGE <br />OR IMPERVIOUS SOII ._ �� ":�-i:.e•'� SAND i GNAVEL <br />�� •. "�':•., � •. _ . .� <br />.�� �� :� •+'.'•:�; <br />.' �, ' � � �.. .�;' <br />;�;i :.:• : i- , .. <br />..... `' <br />'�.:•' • ~ `'' SVl1E AD OR •.=" <br />• �'•� � •i: CONTINUOUS ��. <br />SUBDRAIN VIPE •.';�•�;•::.-:�• FOOTING :...% <br />not to se�l• <br />MATERIALS <br />SUBDRAIN PIPE <br />4";�tinimum Dia. Perfora:ed Or Slotted <br />Cuncrete, :�tetal, :�sbestos-Cement Or <br />Plastic Pipe. Tight Jointed, Sloped To <br />Di•ain (4"/ 100' min. slope), �Nith <br />C:ean-Out=_. <br />g:otted Pipe-- ll8" i�Iax. Width Slot_= <br />P�rforated Pipe--3/16" to 3/S�� Holes <br />Slots Or Yer torations Preferentia:ly <br />In Lower Half Of Pipe With Lower <br />Quarter Segment Solid For �Vater Flow. <br />LE'•..'.INAGE SA[�ID & GR�VEL <br />Tc .yleet 4Vashington State Spec:fications <br />Or The Following Gradation. <br />Sieve Size Passin� By Wei�ht <br />1-1/2" 100 <br />3/4" 70-90 <br />1/4'' 30-60 <br />No. 8 20-50 <br />Vo. 30 8-30 <br />No. 50 3-1'l <br />No. 200 0-1. 2 <br />(by wet sieving) (non-piastic) <br />WEEP HOLES <br />NO'f ES <br />1. Drainage Sand & Gravel Beneath <br />Floor Slab Should Be Connecced <br />Hydraulically To Subdrain Pipe. <br />Use Of 2" Dia. Weep Holes Is <br />One 4pplicable Method. <br />2. Subdrain Pipe Should Be Bedded <br />W,[h a Minimum Of 2" Of Drainage <br />Sand & Gravel �urrowi4ing The <br />Pipe. <br />3, Backfill V4'ithin 18" Of R'all �hould <br />Be Compacted With Hand-Operated <br />Equipment. Iieavy Equipment Shouid <br />Not Be LTsed For Bac:l:fi?:, As Such <br />Operation Could Increase Lateral <br />Earth Pressures And Pos_=ibly <br />Damage The �9all. <br />4. All Backfill Should Be Placed Ln <br />Layers Not Esceeding 6" Loose <br />Thickness And Denaely Compacted. <br />Beneath Paved Or Sidewalk Areas, <br />Compact To At Least 95%. Modified <br />Proctor Mazimum Density (ASTM: <br />D1557, Method C?. Otherwise <br />Compact To 90% Minimum. <br />SUBDRAIN & BACKFILL SCHEME <br />S;IALLOW FOO'IiNGS WITH INTERIOR SLAB ON GRADE s�Z <br />i <br />