The fabrication of the steel structure was car- ried out in the cities of Lauterbourg Nantes and Charleville-Mézières. Lengths of lami- nated steel and different shapes of cast steel were assembled by manual and semi-auto- matic welding. The laminate steel is in sev- eral grades of toughness; the thick tension member is in S355NL grade, the less thick plates in the compression boom, and the sup- port moment transformer is in S355N. These are fine grained structural steels. In the code S symbolises Structural, 355 is the nominal strength as the elastic limit, in MPa., N sym- bolises Normalised (the steel is heated then allowed to cool slowly) and L symbolises that is has good low temperature toughness. The steel is also shown to have good transverse ductility, to avoid crcking under the welds of the fasces. The steels are made in Dillingen, Ittre and Outreau. Other materials had been considered during the design process. The higher strength steels, grade S420, were inter- esting but not widely available, and the reduc- tion of section would have caused an unfortu- nate increase in deflections.
La vesica centrale de la plus récente des passer- elles sure la Seine a Paris, en provenance des ateliers de Lauterbourg d’Eiffel, ayant descendu le Rhin, longé la Manche, remonté la Seine, traversera la ville par voie d’eau, le mercredi 30 novembre 2005. C’est une poutre á treilis lenticulare avec une âme pectiné. Cette partie de l’ouvrage mesure 108m de long, 12m de large et pése 540 tonnes. Le pro- gramme probable de son passage est le suivant: 7:30h départ du Quai du Point do Jour Bologne 8:00h Tour Eiffel 8:30 Pont de la Concorde 9:00h Pont Neuf 9:30h Pont de la Tournelle 10:00h Quai de Bercy å une heure prés ...
RFR-Paris www.rfr.fr Affaire 500 29/11/05 hb
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