The Structural Engineer > Archive > Volume 68 (1990) > Issues > Issue 8 > Implane Stability in Portal Frames
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Implane Stability in Portal Frames

BS 5950: Part I appears to give no guidance regarding the effective lengths about the xx axis to be used in the design of columns in portal frames. This paper attempts to throw some light on why the information that engineers seek may have been omitted and to offer some guidance regarding the correct way to design portal frames for inplane stability. Some deficiencies in clause 5.5.3.2 of BS 5950: Part I are revealed, and the paper concludes with a proposal for a revision of this clause. Professor J.M. Davies