2. Cable/Duct/Micro duct Trenches 2.01 Cable/Duct/Micro duct trenches are given separately, stating the type or width and depth. 2.02 Cable/Duct/Micro duct trenches are given in metres.2.03 Rates for measured work are deemed to include the costs of: excavation, including backfilling, disposal of surplus excavated material and earthwork support, protective tile and/or tapes, cable markers. keeping the excavation free from water, however arising, including ground water. 3. Cable ducts and duct banks 3.01 Cable ducts and duct banks are each given separately, stating the type, number and size of ducts. 3.02 Cable ducts and duct banks are given in meters. 3.03 Rates for measured work are deemed to include the costs of: excavation, including backfilling, disposal of surplus excavated material and earthwork support, concrete works, including formwork, shoring as pre the structural drawings and specifications. duct/Micro duct couplers, connectors, closures, plugs, bends, end stops and other duct accessories, duct/Micro duct racks/spacers. keeping the excavation free from water, however arising, including ground water.