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(i <br />k <br />�r� <br />� <br />��H <br />> H t/� <br />K�� <br />H �1 <br />'a H i1 <br />C/� H <br />� O� <br />OH <br />H/��8 <br />y� Y �] <br />�H� <br />i-+ H <br />g �' <br />OCN <br />��� <br />H O fyA <br />SIOPC OUTSIDi�l"�'iRADE AWAY <br />FROM STqUCT1 ; FOR OHAINAG <br />� <br />PAVEMENT OR 78 INCH <br />ORN IMPERVIOUS�SOI�L" <br />G=NERAL FILL <br />WEEP HOLES <br />SUBDRAIN PIPE <br />MATERIALS <br />�: <br />5 <br />not to scala <br />SUBDRA[N PIPE <br />4"Minimum Dia. Perforated Or Slotted <br />Concrete, �Ietal, Asbestos-Cement Or <br />Plastic Pipe. Tight Jointed, Sloped To <br />Drain(4"/100' min. slope), With <br />Clean-Outs. <br />Slotted Pipe-- 1/8" Ular. Width �'iots <br />perforated Pipe-- 3/16" to 3/8" Holes <br />Slots Or Perforations Preferentially <br />In Lower Half Of Pipe With Lower <br />Quarter Segm=nt Solid For Wate: Flow. <br />1�RALNAGE SAND & GR9VEL <br />To Meet Washington State Specifications <br />Or The Following Gradation. <br />Sieve Size Passin� By Weight <br />— —1 1/2" 100 <br />3/4" 70-90 <br />1/4 30-60 <br />No. 8" 20-50 <br />No. 30 6-30 <br />No. SQ 3-12 <br />No. 200 0-1.2 <br />(by wet sieving) (non-plastic) <br />i� <br />E%TERIOR RETAINING WA�L <br />i <br />DAMP PROOFING <br />VAPOR BARRIER <br />CONCRETE SAND-1 � <br />DRAINAGE SAHD 8 GflAVEL <br />�VOTFS <br />1. Drainage Sand & Gravel Beneath <br />Floor Slab Should Be Connected <br />Hydraulically To Subdrain Pipe. <br />Use Of ?" Dia. Weep Holes Is <br />One Applicable �[ethod. <br />3. Subdrain Pipe Should Be Bedded <br />6Vith A NIinimum Of 6" Oi Drainage <br />Sand & Gravel Surrounding The Pipe <br />3. Backfill Within 18" Of Wall Should <br />Be Compacted With Hand-Operated <br />Equioment. Heavy Equipmenc Should <br />Vot Be Used For Sackfill, :1s Such <br />Operation Could [ncrease Lateral <br />Earth Pressures �nd Possibly <br />Damage The Wall. <br />4. ?.11 Backfill Should Be Placed In <br />Layers Not Exceeding 6" Loose <br />Thickness And Densely Compacted. <br />Beneath Paved Or Sidewalk Areas, <br />Compact To At Least 95% \4odified <br />Proctor Maeinr�m Density (ASTVi: <br />D1557, blethod C). Otherwise <br />Compact To 90O10 VIinimum. <br />SUBDRAIN � BACKFILL SCHEME <br />BASEMENT WALLS WITH INTERIOR SLAB ON GRADE <br />