In all other cases, when the existing concrete is reinforced, the reinforcement within the excavation must be measured and recorded by the undertaker in the relevant street works notice or permit and the reinforcement in the reinstatement must replicate the original construction.
All other reinforcement must be provided in accordance with the following requirements:
The new reinforcement must be lapped and connected to the existing reinforcement. Reliable methods of connecting the bars include tied splices, mechanical fastening and welded splices.
A minimum of 150 mm of the existing reinforcement must be exposed to allow adequate connection of the new reinforcement.
Where 150 mm of the exposed reinforcement cannot be preserved during the excavation, the concrete road slab must be trimmed as necessary to expose additional reinforcement. This additional trimming does not supersede any requirement to provide dowel bars.
Where additional trimming extends beyond 300 mm and the reinforcement cannot be preserved, then the new reinforcement is not required to be connected or lapped.
For narrow trenches and small openings, the cut section of concrete may need to be widened to accommodate tie ins.