CONCRETE PIPE Standard Installation Beddings For each design method (ASTM C76 or Soil and Compaction Requirements Soil Classifications SIDD),Soil and Compactionon one of the design is based (% Standard Proctor Density) Requirements Soil ClassificationsUSCS Soil Types Installation Haunch and Lower Side Description four standard installation beddings, as Type Outer Bedding (Trench Wall) Installation Haunch and Lower Side Description USCS Soil Types described below. In most jurisdictions, Type Outer Bedding (Trench Wall) 90% Category I, or Type II installation is recommended or 95% Category I 95% Category II, or Category I SW, SP 1 90% Category I, or specified as the preferred alternative. 100% Category III Gravelly Sand GW, GP Category I SW, SP 1 95% Category I 95% Category II, or Gravelly Sand GW, GP 100% Category III The following page presents the ASTM 90% Category I 85% Category I, or or 90% Category II, or GM, SM, ML C76 pipe class estimations according to 2 Category II 95% Category II 95% Category III Also GC, maximum allowable cover depths based 90% Category I 85% Category I, or GM, SM, ML SC with Sandy Silt Category II less than 20% 2 or 90% Category II, or Also GC, SCpassing #200 with less on the standard installations described Sandy Silt 85% Category IIIor I, 85% Category I, or than 20% passing #200 95% Category II 95% Category below. 3 standard InstallatIon bEddIngs 3 85% Category I, or 90% Category II, or 95% Category III 85% Category III, or No Compaction required for Category I or II 4 85% Category I, or 90%85% CategoryII, or Category III, or 95% No Compaction Category III required for Category I or II 90% Category II, or 95% Category III 90% Category II, or 95% Category III 4 85% Category III, or No Compaction required for Category I or II 85% Category III, or Silty Clay No Compaction required for Category I or II Category III Category III Silty Clay CL, MH GC, SC, CH CL, MH GC, SC, CH Notes: 1 . The Pipe Class Estimation Table on the following page is based on the “Standard Practice for the Design and Installation of Rigid Gravity Sewer Pipe in the City of Calgary”, using the following parameters: Backfill soil density: 2165 kg/m3 CL-800 Highway Live Loading 2 . Full fluid load in pipe Embankment installation (most conservative) Bedding types as defined in ASTM C1479 (details above) The Pipe Class Estimation Table is provided for covenience, but is not intended to replace proper engineering design . PAGE 36 LAFARGE PIPE eMANUAL