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HomeMy Public PortalAboutPipeBeddingforFlexiblePipe18_48 Diameter9"MIN. LINE OF ACTUAL EXCAVATION "MINIMUM TRENCH WIDTH" PIPE OUTSIDE DIAMETER PLUS 18" PAYLINE WIDTH "W" SEE TABLE NO. 1 TO LINE OF ACTUAL EXCAVATION OR TRENCH BRACING. Pf ' ' 1 LIMESTONE AND SCREENINGS. r• (MSD 3 - BACKFILL MATERIAL) j . /I OUTSIDE OF PIPE BELL ', OUTSIDE OF PIPE BARREL / PLANE OF SPRINGLINE � CAREFULLY CONSOLIDATE BEDDING MATERIAL BETWEEN •' SPRING LINE AND FLOW LINE BY AN APPROVED METHOD I riLOW % 4"MIN.(*) EXCAVATION Al \ /,. /, A LINE OF ACTUAL .` ` APAYLINE FOR "C" IN HIGHLY ORGANIC OR OPENLY FLOWING SOILS, THIS DEPTH SHALL BE INCREASED AS REQUIRED BY THE DISTRICT. • i , COMPACTED CRUSHED PAYLINE FOR "C" EXCAVATION 9"MIN.1 EXCAVATION PROVIDE BELL HOLES BLOCKING OF PIPE AT EACH JOINT NOT PERMITTED NOTES: 1) CHECK GRADE OF PIPE AFTER COMPACTION TO INSURE THE DESIRED FLOWLINE HAS NOT CHANGED. 2) DURING JETTING PROCESS, NOZZLE SHALL NOT BE INSERTED CLOSER THAN TWO FEET FROM TOP OF PIPE. 3) ANY TRENCH BRACING USED BELOW THE TOP OF PIPE SHALL BE LEFT IN PLACE. 4) FOR INSTALLATIONS IN HIGHLY ORGANIC OR OPENLY FLOWING SOILS, THE ENTIRE PERIMETER OF THE PIPE BEDDING SHALL BE WRAPPED WIITH AN APPROVED FILTER FABRIC OR THE "MINIMUM TRENCH WIDTH" SHALL BE EXPANDED BY INCREASING THE DISTANCE BETWEEN THE SIDE OF THE PIPE AND THE LINE OF ACTUAL EXCAVATION OR TRENCH BRACING TO A MINIMUM OF ONE PIPE DIAMETER. PIPE BEDDING FOR FLEXIBLE PIPE 21" — 48" DIAMETER METROPOLITAN ST. LOUIS SEWER DISTRICT Standard Details of Sewer Construction Dr. P.T.K. Ch. D.R.M. 2009 SHEET 6