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Exterior Wall <br /> Sloped To Drain Away <br /> From Structure <br /> —III-III' <br /> -gp\\/\/ 1 Wall Drainage Material <br /> Pavement Or 24 /� —11 I=_—) , <br /> Low Permeability Soil //' I I 1 111I I111' -Z.E <br /> /" 11=1 I I—_:••• 2'Min. <br /> Retained Soil % =1 1=1 I <br /> 1=1 11=1 I I-,\ Damp Proofing/Water Proofing <br /> I\I 1= � Geocomposite Drainage Board Per Others <br /> Temporary -11 •: <br /> Excavation Slope H LE 4.11 Vapor Retarder <br /> II _I11 , <br /> .• Floor Slab <br /> Geotextile Filter Fabric ,� •fot••� Ii �` •'" ��•'ibrbi�� <br /> 12"Min.Cover Of Capillary Break <br /> Drainage Material(6" — <br /> Min.On Sides Of Pipe) 4"Diameter <br /> Perforated Drain Pipe <br /> Not To Scale <br /> MATERIALS: <br /> A. WALL DRAINAGE MATERIAL <br /> 03 <br /> May consist of washed 3/8-inch to No.8 pea gravel per Section 9-03.1(4)C Grading No.8,or conform to Section 9-03.12(4)of the 2018 <br /> WSDOT Standard Specifications provided the drainage material is surrounded by a non-woven geotextile fabric such as Mirafi 140N(or <br /> g approved equivalent).The wall drainage material should be covered with 2 feet of less permeable material,such as the on-site silty <br /> sand that is properly moisture conditioned and compacted.A geotextile separator should be placed between the wall drainage material <br /> N and overlying cover soil. <br /> o B. RETAINED SOIL <br /> o Should consist of structural fill,either on-site soil or imported.The backfill should be compacted in loose lifts not exceeding 6 inches. <br /> r Wall backfill supporting building floor slabs should consist of imported sand and gravel per WSDOT Standard Specification 9-03.14 <br /> a compacted to at least 95 percent ASTM D1557.Backfill not supporting building floor slabs,sidewalks,or pavement should be <br /> compacted to 90 to 92 percent of the maximum dry density,per ASTM D1557.Backfill supporting sidewalks or pavement areas should <br /> be compacted to at least 95 percent in the upper two feet.Only hand-operated equipment should be used for compaction within 5 feet <br /> of the walls and no heavy equipment should be allowed within 5 feet of the wall. <br /> C. CAPILLARY BREAK <br /> 3 Should consist of at least 4 inches of clean crushed gravel meeting the gradation of WSDOT Standard Specification Section <br /> 9-03.1(4),AASHTO Grading No.67,or clean crushed gravel meeting the gradation of Seattle Mineral Aggregate Type 28 <br /> D. PERFORATED DRAIN PIPE <br /> Should consist of a 4-inch diameter perforated heavy-wall solid pipe(SDR-35 PVC)or rigid corrugated polyethylene pipe(ADS N-12)or <br /> equivalent.Drain pipes should be placed with 0.25 percent minimum slopes and discharge to the storm water collection system. <br /> LL <br /> (()I <br /> O <br /> LL <br /> 0 <br /> 0 <br /> M <br /> 0 <br /> 0 <br /> W <br /> O <br /> Foundation Drainage <br /> U <br /> Ql <br /> O 7800 Evergreen Way <br /> Everett, Washington <br /> GEOENGINEERS N <br /> Figure3 <br /> N <br />