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engineers surveyors planners scientists MorrisonMaierleN:\2200\045\ACAD\CIVIL\SHEETS\C-112_UNDERGROUND STORAGE DETAILS.DWG December 16, 2019
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ACCEPTABLE FILL MATERIALS: STORMTEC
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PLEASE NOTE:1.THE LISTED AASHTO DESIGNATIONS ARE FOR GRADATIONS ONLY. THE STONE MUST ALSO BE CLEAN, CRUSHED, ANGULAR. FOR
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(AASHTO M43) STONE".2.STORMTECH COMPACTION REQUIREMENTS ARE MET FOR 'A' LOCATION MATERIALS WHEN PLACED AND COMPACTED IN 6" (150 m
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3.WHERE INFILTRATION SURFACES MAY BE COMPROMISED BY COMPACTION, FOR STANDARD DESIGN LOAD CONDITIONS, A FLAT
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SPECIAL LOAD DESIGNS, CONTACT STORMTECH FOR COMPACTION REQUIREMENTS.NOTES:1.SC-740 CHAMBERS SHALL CONFORM TO THE REQUIREMENTS OF ASTMF2418 "STANDARD SPECIFICATION FOR POLYPROPYLENE (PP)CORRUGATED WALL STORMWATER COLLECTION CHAMBERS", ORASTM F2922 "STANDARD SPECIFICATION FOR POLYETHYLENE (PE)CORRUGATED WALL STORMWATER COLLECTION CHAMBERS".2.SC-740 CHAMBERS SHALL BE DESIGNED IN ACCORDANCE WITH ASTMF2787 "STANDARD PRACTICE FOR STRUCTURAL DESIGN OFTHERMOPLASTIC CORRUGATED WALL STORMWATER COLLECTIONCHAMBERS".3."ACCEPTABLE FILL MATERIALS" TABLE ABOVE PROVIDES MATERIALLOCATIONS, DESCRIPTIONS, GRADATIONS, AND COMPACTIONREQUIREMENTS FOR FOUNDATION, EMBEDMENT, AND FILL MATERIALS.4.THE SITE DESIGN ENGINEER IS RESPONSIBLE FOR ASSESSING THEBEARING RESISTANCE (ALLOWABLE BEARING CAPACITY) OF THESUBGRADE SOILS AND THE DEPTH OF FOUNDATION STONE WITHCONSIDERATION FOR THE RANGE OF EXPECTED SOIL MOISTURECONDITIONS.5.PERIMETER STONE MUST BE EXTENDED HORIZONTALLY TO THEEXCAVATION WALL FOR BOTH VERTICAL AND SLOPED EXCAVATIONWALLS.6.ONCE LAYER 'C' IS PLACED, ANY SOIL/MATERIAL CAN BE PLACED INLAYER 'D' UP TO THE FINISHED GRADE. MOST PAVEMENT SUBBASESOILS CAN BE USED TO REPLACE THE MATERIAL REQUIREMENTS OFLAYER 'C' OR 'D' AT THE SITE DESIGN ENGINEER'S DISCRETION.MATERIAL LOCATIONDESCRIPTION
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D FINAL FILL: FILL MATERIAL FOR LAYER 'D' STARTSFROM THE TOP OF THE 'C' LAYER TO THE BOTTOMOF FLEXIBLE PAVEMENT OR UNPAVED FINISHEDGRADE ABOVE. NOTE THAT PAVEMENT SUBBASEMAY BE PART OF THE 'D' LAYER ANY SOIL/ROCK MATERIALS, NATIVE SOILS, OR PERENGINEER'S PLANS. CHECK PLANS FOR PAVEMENTSUBGRADE REQUIREMENTS.
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C INITIAL FILL: FILL MATERIAL FOR LAYER 'C'STARTS FROM THE TOP OF THE EMBEDMENTSTONE ('B' LAYER) TO 18" (450 mm) ABOVE THETOP OF THE CHAMBER. NOTE THAT PAVEMENTSUBBASE MAY BE A PART OF THE 'C' LAYER.GRANULAR WELL-GRADED SOIL/AGGREGATE MIXTURES, <35%FINES OR PROCESSED AGGREGATE. MOST PAVEMENT SUBBASE MATERIALS CAN BE USED IN LIEUOF THIS LAYER.
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