The cross-sections used in for the columns and beams forming of the moment transfer -resisting frames must not undergo local buckling and must be compact enough to provide certain ductility capacity. If the ductility level is limited, therefore, the Thus, for the moderately ductile level limit values are higher.
Local buckling should not occur in order for the must be prevented for horizontal load-bearing system elements to make perform sufficient plastic deformation . The conditions under earthquake effects. For this purpose, the width-to-thickness ratios of elements must be satisfied according to the conditions given in Table 9.3 must therefore be observed.
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