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APPROVALS T&D MGR CITY OF ANAHEIM ELECTRICAL DIVISION PUBLIC UTILITIES DEPARTMENT FILENAME: REVISION KEYS: ADDED / REVISED TEXT NEW SHEET CONSTRUCTION STANDARD: ADDED / REVISED MATERIAL SHEET OF REVISION NO. ISSUE DATE : FIELD MGR OPER. MGR T&D CONSTRUCTION STANDARDS UNDERGROUND CONDUIT BANK INSTALLATION IN A BORE CASING CU1600-96E REV3 3 01-11 1 1 CU 1600-96E SCOPE: THIS STANDARD SHOWS UNDERGROUND CONDUIT BANK INSTALLATION IN A BORE CASING. 3" CIRCULAR TYPE SPACER STEEL CASING SAND/CEMENT SLURRY (SEE NOTE 6) DISTANCE BETWEEN SPACERS (SEE NOTE 4) MINIMUM CASING I.D. (IN INCHES) SIZE METHOD 5" GRID/SOLID TYPE SPACER 3" (SEE NOTE 7) CONDUIT 6" 5" 6" B B A A 20" - - 4 - 24" - - - 4 - 6 6 6 28" - - 9 9 30" 6 8 - - 32" 9 - - - 36" - 10 - - 38" 12 12 - - 44" 16 - - - 48" GROUND WIRE METHOD A CIRCULAR SPACER METHOD B GRID/SOLID SPACER NUMBER OF CONDUITS IN BORE CASING NOTES: 1. INSTALLATION SHALL BE MADE BY MACHINE BORING OR BY JACKING. SLUICING AND JETTING WITH WATER IS NOT PERMITTED. A LIMITED USE OF WATER FOR LUBRICATION OF DRILLS MAY BE PERMITTED, HOWEVER, BY SPECIAL ARRANGEMENT WITH LOCAL GOVERNING INSPECTION AUTHORITIES. 2. A NEW STEEL CASING WILL NORMALLY BE USED. USED CASING, WHICH SHOWS LITTLE OR NO DETERIORATION, MAY BE USED IF JUDGED SATISFACTORY BY A UTILITY INSPECTOR. THE MINIMUM ALLOWABLE CASING THICKNESS IS 1/4". STATE HIGHWAY CONSTRUCTION REQUIRES A 1/4" WALL THICKNESS IF UNDER 30" IN DIAMETER; A 3/8" WALL THICKNESS FOR DIAMETERS UP TO 42" AND A 1/2" THICKNESS FOR DIAMETERS 42" AND GREATER. THE TYPE OF CONSTRUCTION SHOULD GOVERN THE WALL THICKNESS. 3. CONDUITS INSTALLED IN THE CASING AS IN METHOD OR ABOVE SHALL BE SCH. 40 PVC, SEE CU 1600-96F; NOTE 5, AND CU 1600-4A. 4. SPACERS SHALL BE OF THE TYPE AND DESIGN AS APPROVED BY THE CITY. SPACERS THE DISTANCE SHALL BE INSTALLED AND MAINTAINED IN A VERTICAL POSITION. (SEE CU 1600-96F BETWEEN SPACERS SHALL BE LIMITED TO A MAXIMUM OF FIVE FEET. FOR SPACER DESIGNS). NOT PERMITTED. FOREIGN UTILITIES 5. THE INSTALLATION OF FOREIGN UTILITIES IN CITY BORE CASING IS NOT PERMITTED. 6. CONDUITS SHALL MAINTAIN THE SAME POSITION ENTERING AND LEAVING THE CASING. AFTER THE CONDUITS ARE IN PLACE A SAND/CEMENT SLURRY (MINIMUM OF SIX SACKS OF CEMENT PER CUBIC YARD) SHALL BE USED TO FILL ALL VOIDS. 7. WHEN SPECIFIED ON WORKING DRAWING, CONTRACTOR SHALL INSTALL INSULATED COPPER GROUND WIRE THRU CASING. 8. THE CALIFORNIA DIVISION OF INDUSTRIAL SAFETY, MINING AND TUNNELING UNIT SHALL BE NOTIFIED BY CITY AND AN UNDERGROUND CLASSIFICATION PERMIT BE ISSUED PRIOR TO THE INSTALLATION OF ANY BORE CASING 30" IN DIAMETER OR LARGER.