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� <br /> I <br /> AW YEFROM�STRUCTURE CONCRETE SANO <br /> � FOR DRAINAGE � <br /> I FLOOR SLA6 <br /> ..c:•:� = <br /> �..r^.:v_:.,a•.iCw• <br /> � /� .Y.��;��. .���:� � ;:� , .. � �_. •.i�.y <br /> � � , t'._ • . :. ..!:•. . � <br /> . i'.:_ .• <br /> ;'ti'.• . .e � �. � � Y ��•� : <br /> PAVEMENT OR �j/�//� :-.' •.-. ,r :�,., • • .. <br /> 101NCMES MIN. � �� '':••••• . . <br /> Of TAMPED TOPSOI' ( / "� � �0 • �: VAPOR BARRIER <br />� ly OR IMPiRV10US SOII - _�":`•% !.•. • <br /> ! �� •: f:%..�: • ', i ..,�:.•i. ' ORAINAOE <br /> . . ;• ..+ ;•�' _ :'• �'• •,; i SAND 8 GRAVEL <br /> ,. .' c� . -:�r _ '+ ' .: <br /> � � .:' 1,.: :,• „'•' , ' '', :..• �.. : <br /> � �. 1 . � i�.. . .. .� <br /> �� ._ .� . � l=. . <br /> � . �' • ''� SPREAD Oq . �'�� WEEP MOLES <br /> 5UBDRAIN P! PE� . •,'�"�:;,. . '�� CON7INUOUS :!:� <br /> � •-:.�•.•.::;::: FOOTING :�= <br />' ' `� not to aul� <br /> �� <br /> � MATERIALS NOTES <br /> 1. Drainage Sand & Gravel Beneath <br /> � ;, SUBDRAIN PIPE Floor Slab Should Be Connected <br /> , f 4'rlyIinimum Dia. Perforated Or Slotted Hydraulically To Subdrain Pipe. <br /> Concrete, Metal, Asbestos-Cement Or Use Of 2" Dia. Weep Holes Is <br />, �g Plastic Pipe. Tight Jointed, Sloped To One Applicable Method. <br /> � Drain (4"/ 100' min. slope), With <br /> Clean-Outs. 2. Subdrain Pipe Should Be Bedded <br /> I k 5lotted Pipe-- 1/8" Mau[. Width Slots With A Minimum Of 2" Of Drainage <br /> I ' Perforated Pipe--3/16" to 3/8" Holes Sand & Gravel 5urrounding The <br />�� Slots Or Perforations Preferentially Pipe. <br /> I .1 In Low�er Half Of pipe With Lower <br /> k Quarter Segment Solid For Water Flow. 3. Backfill 4Vithin 18" Of Wail Should <br /> Be Compacted With Hand-Operated <br /> i DRAINAGE SAND & GRAVEL Equipment. Heavy Equipment Should <br /> � ` To Meet Washington State Specifications Not Be Used For Backfill, 9s Such <br /> Or The Following Gradation. Operation Could Increase Lateral <br /> � Earth Pressures And Possibly <br /> � ` Sieve Size Passin� By tAei�ht Damage The Wall. <br /> — �-�r„ — — �oo — <br /> ' 3�4�� 70-90 4. All Backfiil Shouid Be Placed In <br /> � " 1/4" 30-60 <br /> Layers Not Exceeding 6" Loose <br /> No, S 20-50 Thickness And Densely Compacted. <br /> No. 30 8-30 Beneath Paved Or Sidewalk Areas, <br /> � a No. 50 3-12 Compact To At Least 95%. Modified <br /> No. 200 0-1, 2 Proctor Maximum Density (ASTM; <br /> � (by wet sieving) (non-plastic} D1557, Method C). Otherwise <br /> Compact To 90% Minimum. <br /> ir <br /> � � SUBDRAIN & BACKFILL SCHEME <br /> SHALLOW FOOTINGS WITH IN7ERIOR SLAB ON GRADE <br /> t. <br />