Atch_10_-_E-5302-E-5302_Duct_Band_and_Counterpoise_Construction_Details.pdf

NATIVE SOIL COMPACTED

TO 95% DENSITY OR

NEW PAVEMENT

B

B

N.T.S.

SECTION B−B

4" NON−PERFORATED PVC PIPE AND

FITTINGS WHERE SHOWN ON PLANS.

SEE E−6101 FOR SCHEDULE.

UNDISTURBED EARTH

BURIAL DEPTH AS REQUIRED

TO DRAIN.

FINISHED GRADE

#4 BARE COPPER

COUNTERPOISE

3"

MINIMUM DEPTH:

2−WAY DUCTS − 29 INCHES

ALL OTHER DUCTS − 24 INCHES

INTERMEDIATE SPACER

BASE SPACER

USE SIDE FORMS

WHERE NECESSARY

WARNING TAPE

CONCRETE

ENCASED DUCT

BANK. SEE NOTE 2.

4" X 10’ COPPER

CLAD GROUND

ROD

BOND COUNDERPOISE TO

GROUND ROD USING ONE SHOT

EXOTHERMIC WELD

12"

MIN.

N.T.S.

30" #4 TIE BAR. MINIMUM 4 PER COLD JOINT

EMBEDDED IN WET CONCRETE. (TYP)

15"

2.25"

2.25"

SEE E−5301 FOR DUCT

BANK CONFIGURATIONS

#4 TIE BARS WHERE

NEEDED. SEE COLD

JOINT DETAIL THIS

SHEET.

2.25"

2.25"

4’−0"

MAX

2" NOMINAL CONDUIT

SUPPORT AS NEEDED TO KEEP

TIE BAR HORIZONTAL. (TYP)

1. FOR NON−METALLIC CONDUITS, TERMINATE WITH PLASTIC COUPLINGS SET FLUSH WITH

END OF CONCRETE ENVELOPE AND INSTALL PLASTIC PLUGS.

2. CONCRETE FOR CONCRETE ENCASED DUCT SHALL CONTAIN A RED DYE TO IDENTIFY

DUCT AS AIRFIELD ELECTRICAL DUCT BANK.

3. INSTALL COUNTERPOISE WITH ALL DUCT BANK AND CONDUIT.

4. DO NOT CONNECT COUNTERPOISE TO LIGHT BASES OR MANHOLES/HANDHOLES

GROUNDING COMPONENTS. LOOP COUNTERPOISE AROUND ALL MANHOLES.

5. PROVIDE GROUND RODS SPACED MAX. 1,000−FT.

6. WHEN UNDER PAVEMENT PLACE COUNTERPOISE ON NEXT−TO−LAST LIFT OF COMPACTED

BASE MATERIAL.

7. SEE SHEET E−5301 FOR RE−INFORCEMENT DETAILS.

8. PLACE EACH SERIES CIRCUIT IN ITS OWN 2 INCH CONCRETE ENCASED PVC CONDUIT. USE

#6 AWG, 5KV, FAA L−824 CONDUCTORS AND ONE #6 AWG, THWN GREEN INSULATED

GROUND PER CIRCUIT.

9. DO NOT BACKFILL OVER COUNTERPOISE BEFORE COR HAS TESTED EXOTHERMIC WELDS

WITH A HAMMER AND VISUALLY INSPECTED COUNTERPOISE.

3’ − 8’

3"

MIN.

1"

MIN.

BACKFILL WITH SUBDRAIN

BEDDING MATERIAL

(33 46 16)

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DC01 23-JUL-13

FA4621-13-R-0003 Duct Bank and Counterpoise Attachment 10