Monitoring of the structure of the western façade of the Cathédrale Saint-Etienne de Châlons-en-Champagne

Summary

The tender concerns continuous monitoring of the structure of the western façade of the Cathédrale Saint-Etienne de Châlons-en-Champagne. The contractor must carry out successive surveys and compare them over time to identify any changes in the observed defects. The monitoring is planned in two phases: a short-term period of 3 years to understand seasonal behaviour, and a longer-term period to detect presumed slow movements, with the long-term follow-up to be defined and calibrated based on the short-term results. The technical specifications describe the type and location of the surveys and the information expected in the reports.