The semi-compact section of a laterally unsupported steel beam has an elastic section modulus, plastic section modulus and design bending compressive stress of $500 \mathrm{~cm}^{3}, 650 \mathrm{~cm}^{3}$ and $200 \mathrm{MPa}$, respectively. The design flexural capacity (expressed in $\mathrm{kNm}$ ) of the section is

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The semi-compact section of a laterally unsupported steel beam has an elastic section modulus, plastic section modulus and design bending compressive stress of $500 \mathrm{~cm}^{3}, 650 \mathrm{~cm}^{3}$ and $200 \mathrm{MPa}$, respectively. The design flexural capacity (expressed in $\mathrm{kNm}$ ) of the section is