127 Category 4: Special Projects 4 Owner Lefevre Architect Comi Service General Contractor Lefevre Engineering Office Comi Service Construction Period 06/2016 - 04/2017 For the renovation of this tall church, a large scaffold was necessary to provide the access to all parts of the monument. To meet contractor’s instructions, the scaffold is fixed to the stone up to the roof and is self-standing above it. The scaffold is 68 m high, 12 m wide, 32 m long and weighs 232 tons. The structure was designed according to the special scaffolding codes NF12810, NF12811, EN74 and the Eurocodes. The specific scaffold’s non-linear hinges have been defined precisely and a non-linear analysis using the iterative Timoshenko method was performed. The model consists of a half symmetrical structure, contains 41,734 nodes, 23,775 beams and 30 non-linear combinations. For structures of this height, wind is the most critical load. To find a suitable geometrical configuration for the scaffold was a very difficult challenge. SCIA Engineer’s scaffold and steel checks helped precisely observe the load distribution and optimise the structure. Comi Service Contact Rémi Martin Address Batiment A6 Europarc de Pichaury 13856 Aix les Milles, France Website www.comi-service.com Subsidiary of the Altrad Group, Comi Service specializes in scaffolding. Its engineering office handles the most technically challenging projects and its country-wide presence, with six agencies, allows us to intervene anywhere in the country. Comi Service in figures: • 331 full-time employees. • €40 million revenue. A stock of 10,000 tons of multi-directional NF material of the Layher and Plettac brands. Notre Dame Renovation Scaffold - Cholet, France
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