Cover page Title: Parametrical study on the behaviour of steel and composite cellular beams under fire conditions Authors: O. Vassart (ArcelorMittal R&D, G.-D. of Luxemburg) C. G. Bailey (University of Manchester, UK) G. Bihina (CTICM, France) M. Hawes (ASDWestok Limited, UK) A. Nadjai (University of Ulster, UK) C. Peigneux (University of Liège, Belgium) W. I. Simms (SCI, UK) J.-M. Franssen (University of Liège, Belgium)