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f� <br /> I Sl OPC OUTSIOE GRADE AWAY <br /> FROY STRUCTURF FOR DNAINAG <br /> � <br /> I ///���/ EXTERIOH HETAINING WAL� <br /> PAVEIHENT OR 1a INCHES <br /> '•,*� <br /> � MIN. TAMPED TOPSOIL ' �S` S � Iy :-.�:- DANP PROOFING <br /> OR INpEHYlOUS SOIL 5 'Pr�! <br /> � ' 1 Ss ,e• <br /> min. <br /> �.:.. <br /> �'� G=NERAI FILL _ � ;•,e`._; <br /> . SS tS { '' � VAPOR BARRIER <br /> C ,�'�: <br /> � � )� S Io:,s CONCRETE SAND <br /> �� � � ni%�• FIOOR SLAB <br /> � WEEP MOLES � :Y'.• .n;>.•-::�:_:.::::.: ...,� <br /> _ . -:_ '"`' . <br /> � �;e:, - �_ .�: •.i: '.�-e�•�.v;•.��.�... <br /> .r� ..�.�.•-, � ' �.•e�.-:' :a:.Cy�^il.'•'++ <br /> .•.�.::�_..s. : •�: ::�-,-..... <br />' � � � �1 SU60RAIN PIPE - •��;j, <br />' � �n 'u, DRAINAGE SAND 8 GRAVEL <br /> . �� not to seal• <br />�� j _�, .,�., Y <br /> � " MATERIALS � I30TE8 <br /> fi ' 1. Drainage Sand & Gravel Bene>th <br /> ( SUBDRAIN PIP£ Floor Slab Should Be Connected <br /> 4" ;1�Iinimum Dia. Perforated Or Sloited Hydraulically To Subdrain Pipe. <br /> Concrete, Metal, Ashestos-Cement Or Use Of 2" Dia. Weep Holes Is <br /> � '' Plastic Pi <br /> � . pe. Tight Jointed, 5loped To One Applicable Method. <br /> Drain (4"/100' min. slope}, With <br /> Clean-Outs. 2. Subdrain Pipe Should Be Bedded <br /> � � Slotted Pipe-- 1/8" MaY. Width Slots With A Minimum Of 6" Of Drzinage <br /> Pertorated Pipe-- 3/ 16" to 3/S" Iioles Sand & Gravei S�rrounding The Pipe. <br />; Slots Or Perforations Preferentially <br />• � � Ia Lower Half Of Pipe With Lower 3. Backfill Within 18" Of Wall Should <br /> � : <br /> Quarter Segm�nt Solid For Water Flow.� Be Compacted 4Vith Hand-Operated <br /> � Equipment. Heavy Equipment 5hould <br /> DRAINAGE SAND & GRAVEL Not Be Used For Backfill, As Such <br />' ( 4 — — — — <br /> To Meet Washingtoq State Specifications Operation Could Increase Laterai <br /> i Or The Following Gradation. Earth Pressures And Possibly <br /> � , Damage The Wall. <br /> Sieve Size Passin B Weight <br /> _ �_�' - - <br /> � - 1-1%2" 100 4. All Backfill Should Be Placed Ln <br /> R q 3/4" 70-90 Layers Not Exceeding 6" Loose <br /> 1/4" 30-60 Thickness And Densely Compacted. <br />� � No. 8' 20-50 Beneath Paved Or Sidewalk Areas, <br /> I a No. 30 g_gp Compact To At Least 95%. Modi.fied <br />� . No. 50 3-lg . Proctor Maximim Density (AST:VI: <br /> No. 200 p-1. 2 D1557, Method C?: Otherwise <br /> � * (by wet sieving} (non-plastic) ' Compact To 90°�L Minimum. <br /> ' " SUBDRAIN � BACKFILL SCHEME <br /> B.ASEMENT WALLS WITH INTERIOR SLAB ON GRADE <br /> ie <br />