Supply and installation of a lightning-protection system for the Gräfin-Sayn school extension

Summary

The procurement covers the supply and installation of a lightning-protection and earthing system for the extension and renovation works at Gräfin-Sayn Comprehensive Primary School in Drolshagen. The work includes roof air-termination conductors and rods, down conductors, foundation and ring earthing, equipotential bonding, and testing, inspection and documentation of the system. The listed quantities include approximately 740 m of roof lightning-protection conductors, 635 m of stainless-steel connection and earthing conductors, and 420 m of hot-dip galvanised strip steel; some work must interface with the photovoltaic system on parts of the roof. Work will be carried out in phases while the school remains partly operational, so the safety of pupils, staff and visitors must be maintained. Work is scheduled to start on 11 January 2027 and be completed by 23 January 2030. Bids must be submitted electronically in German by 10:00 on 26 October 2026; price is the sole award criterion. The bidder must demonstrate suitability through prequalification or the required self-declarations and evidence. The submission calls for turnover data for comparable works in the last three financial years, experience with comparable works in the last five calendar years, and, if shortlisted, three detailed references. The bidder must confirm the availability of the necessary workforce and provide the requested information on registrations, taxes and social-security contributions. Detailed technical requirements, materials and installation methods are set out in the tender documents.