Question reference: S3W-38394
- Asked by: John Farquhar Munro, MSP for Ross, Skye and Inverness West, Scottish Liberal Democrats
- Date lodged: 15 December 2010
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Current status: Answered by Keith Brown on 20 January 2011
Question
To ask the Scottish Executive what the design life is of the repairs planned for the Cromarty Bridge and how this compares with that of a replacement bridge.
Answer
The planned repairs at Cromarty Bridge have a design life of approximately 20 to 30 years, depending on the nature of the repair. Modern designed structures have a design life of 120 years, however regular maintenance and remedial works will be required throughout this period. Following the refurbishment repairs at Cromarty Bridge, the need for future maintenance will be significantly reduced due to the use of cathodic protection that slows down the rate of corrosion of steel used in reinforced concrete.