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3M™ 7900 Series
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3M™ Warning Tape 7900 Series
D.C. SPECIFICATIONS & Guidelines
District of Columbia Department of Transportation
DDOT Standard Specifications for Highway and Structures, 2013
A Electric Conduits (Concrete Encased)
"... The Contractor shall provide 4 inch detectable warning tape 12 inch above the top of the concrete encasement of the ductbanks as shown in the Contract Drawings. The warning tape shall be detectable by means of sensors in use to detect buried cable and conduit. The color of warning tape shall be yellow. The warning on the tape will be 'CAUTION, BURIED ELECTRICAL LINE BELOW. ..."
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