Q#4. Using AISC column specifications, determine the safe axial loads on W 310x107 section used under following conditions (a) hinged ends and a length of 12 m (b) built-in ends and unsupported length of 14 m (c) built-in ends and a length of 14 m braced at mid point. Use proportional limit for steel as 380 MPa and Modulus of elasticity equal to 200 GPa. Take properties of section from internet or recommended books. Furthermore, discuss in detail about the variation of column capacity with the variation of end conditions of column.
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