An ISMB 250 section is used as a beam in a steel structure is found inadequate to resist the supposed heavy loading. Thus, the above section is provided with two plates of 150 mm × 8mm so as to form built up section and thus enhance the beam capacity. Calculate the enhanced moment capacity of the beam (in kN-m) for Fe 410 material, the permissible bending compressive strength should be considered 0.66 × fy. (Ze for section = 410 × 103 mm3, For the arrangement flange plates on top flanges I = 9.12 × 107 mm4 , Ym = 133 mm, Ze = 685714.2 mm3)
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