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PIPE BEDDING DETAIL <br />90°12"Grade <br />Min. Width "W" <br />=1.25 x O.D.+12" <br />Hand Placed/Shovel-Sliced and Mechanically Tamped in <br />4" Layers Compact to 95% Standard Proctor Density <br />RIGID PIPE <br />Pipe Shall be Bedded Firmly on Undisturbed Ground. <br />Excavate for Bells. No Weight Shall be Supported by <br />the Bells. <br />The Lower 90° Arc of the Barrel of the Pipe <br />Should be in Firm Contact With Undisturbed <br />Earth. The Bedding Shall be Continuous <br />and Uniform for the Length of the Pipe. <br />Small Excavations Should be Made for the Bells. No <br />Weight Shall be Supported by the Bells.These Should <br />be no Larger Than Necessary to Clear the Bell. <br />Compaction not Req'd. <br />if Using Flowable Fill <br />(INDOT Spec.) <br />Mechanically Tamped Layers not Exceeding <br />6" Compact to 95% Standard Proctor Density <br />Backfill - In Streets, Alleys, or Driving Areas: <br />Backfill Shall be of Select Native Granular Material or B-Borrow <br />Material Free of Debris, Organic Material and Large Stones. <br />Placed in 6" Layers, Solidly Tamped to Sub-Grade of Street Base. <br />Backfill Shall be Compacted to 100% Standard Proctor Density. <br />Backfill - In Easement or Open Areas: <br />Backfill Material Shall be of Select Native Granular Material, <br />Placed in 12" Layers, Free of Debris, Organic Material, and Large <br />Stones. <br />Backfill Shall be Compacted to 95% Standard Proctor Density. <br />Pipe Embedment <br />(See Notes 4 and 5) <br />Geotextile Required if #8 <br />or #9 Aggregate is Used <br />"O.D."FLEXIBLE PIPE <br />4" Min. Pipe Bedding <br />UNSUITABLE MATERIAL <br />Remove Unsuitable Material as <br />Required and Place Class I or II <br />Material per ASTM D2321 <br />6/26/18 <br />CITY OF SOUTH BENDItemRevision <br />STANDARD <br />EFFECTIVE DATE: <br />REF STD SPEC SEC 3-3 <br />APPROVED/REVISED BY THE BOARD OF PUBLIC WORKS <br />STANDARDS FOR DESIGN <br />AND CONSTRUCTION <br />Kara M. Boyles, Ph.D., P.E. Date <br />PIPE BEDDING DETAIL 3-10 <br />June 26, 2018 <br />SECTION 3 - STORM <br />NOTES: <br />1.These trench and bedding details are for pipe structural requirements only. The <br />contractor is solely responsible for safety of operations. The contractor shall slope trench <br />walls, provide protective work boxes, and/or shore and brace all excavations as the <br />contractor determines necessary for safety of operations, and in conformance to IOSHA <br />Regulation 29 C.F.R. 1926, Subpart P for Trench Safety Systems. <br />2.All PVC pipe for sanitary sewers shall be installed in accordance with ASTM D2321. <br />3.There shall be no rocks or stones greater than 2" in any dimension within 6" of the pipe <br />wall or bell. <br />4.Flexible Pipe: Embedment materials for bedding, haunching and initial backfill shall <br />comply with the requirements of ASTM D2321, Classes I (INDOT #8 or #9), II (INDOT <br />#53, #73, or B-Borrow), or III and shall be compacted as noted. Removable flowable <br />backfill shall be placed for all areas within 5' of pavement to 12" above pipe crown. <br />above this limit, structure backfill shall be used. Refer to pipe manufacturers <br />recommended bedding and embedment material class type requirements. <br />5.Rigid Pipe: Embedment materials for bedding, haunching and initial backfill shall comply <br />with the requirements of ASTM C12 (VCP) Classes A, B, C or crushed stone (INDOT #8, <br />#9 or B-Borrow) and shall be compacted as noted. Removable flowable backfill shall be <br />placed for all areas within 5' of pavement to 12" above pipe crown. Above this limit, <br />structure backfill shall be used. <br />6.Final backfill shall not contain debris, organic material, frozen material, unstable material <br />or boulders or stones greater than 2" in any dimension. Flowable fill optional. <br />7.The placement and compaction of backfill shall not cause displacement of the pipe. <br />8.For multiple pipes in same trench: <br />a.Place bedding to Spring Line of first pipe across entire trench width. <br />b.Placement of next pipe, re-excavate trench as needed. <br />Then place bedding as noted above. <br />c.For additional pipes repeat as required. <br />9.Refer to INDOT Standard Specification Section 213 for flowable fill (removable) <br />requirements.