This paper deals with the flexural strength and deformability of beams at the rigid frame connection with diaphragms. An improved detail of the connection is proposed without scallops (rat holes) which are conventionally provided at the beam end. From test and analytical results, it has been confirmed that the non-scallop type of connection has advantages over the scallop type with regard to strength, deformability and fabrication costs. r£sum£ Ce rapport traite de resistance ä la flexion et

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... deformations de poutres en acier ä larges ailes, fixees rigidement ä une colonne RHS. La technique de raccordement decrite dans ce rapport, dans laquelle on ne fait pas appel ä des pieces de recouvrement, permet d'accroitre la resistance ä la flexion et de diminuer la deformation tout en reduisant les coüts de fabrication.