FEMA Filter Manual

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2. Types of Filters & ApplicationsRecommendations - 2/2• Collection of seepage on pervious foundationsshould not be underestimated.• Existing dams with large amounts of seepagecan be made worse by adding a filter that blocksflow in more pervious foundation layers.• Relief wells clog with time, resulting indiminished effectiveness. Maintenance isrequired.Clay tile and metal pipes should not be used for drains.34BUILDING STRONG ®
Chapters1. Purpose and Theory of Filters2. Types of Filters and Applications3. Additional Applications4. Laboratory Testing5. Filter Design Procedure6. Other Design Considerations7. Construction35BUILDING STRONG ®
Page 1 and 2: FEMA Filter Manual - an OverviewWor
Page 3 and 4: Primary Authors• David Hammer, US
Page 5 and 6: NomenclatureNarrowly graded = Unifo
Page 7 and 8: NEWNomenclatureDxxYD85B, D15F, D15E
Page 9 and 10: Chapters1. Purpose and Theory of Fi
Page 11 and 12: 1. Purpose and Theory11BUILDING STR
Page 13 and 14: 1. Purpose and Theory13BUILDING STR
Page 15 and 16: 2. Types of Filters & Applications
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Page 19 and 20: 2. Types of Filters & ApplicationsC
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Page 33: 2. Types of Filters & ApplicationsR
Page 37 and 38: 3. Additional ApplicationsAdding Fi
Page 39 and 40: 3. Additional ApplicationsLocation
Page 41 and 42: 3. Additional ApplicationsGeotextil
Page 43 and 44: 3. Additional ApplicationsRecommend
Page 45 and 46: 4. Laboratory TestingTwo Parts to t
Page 47 and 48: Quality4. Laboratory Testing• Sam
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Page 53 and 54: 4. Laboratory TestingRecommendation
Page 55 and 56: 5. Filter Design ProcedureHow doyou
Page 57 and 58: 5. Filter Design ProcedureBase Soil
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Page 71 and 72: 5. Filter Design ProcedureFiltering
Page 73 and 74: 5. Filter Design ProcedureLimit Fin
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6. Other Design ConsiderationsChimn
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6. Other Design ConsiderationsRecom
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7. ConstructionConstruction of Incl
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7. ConstructionConstruction of Vert
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7. ConstructionManufacture and Stor
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7. ConstructionHauling and DumpingB
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7. ConstructionSpreadingSpreaderBox
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7. ConstructionSpreadingDumpinginto
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7. ConstructionSpreadingTowingSprea
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7. ConstructionCompaction Moisture
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7. ConstructionCompaction Specifica
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7. ConstructionField Compaction115B
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7. ConstructionProtecting Placed Fi
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7. ConstructionGeomembrane Protecti
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7. ConstructionField Testing - Dens
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Narrow Toe Drain123BUILDING STRONG
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Narrow Toe Drain125BUILDING STRONG
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Narrow Toe DrainFnd soil pipesinto
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Narrow Toe DrainTrench sidesare too
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Some think the glass is half emptyo
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