A horizontal homogeneous steel beam of mass m = 5 t and length l is hinged at one end to a massive wall; its other end is supported by an iron rod attached to the same wall at an angle a = 30° to the vertical (Fig.). At what cross-sectional area of the rod does its relative compression not exceed e = 0.001, if the modulus of elasticity of the material of the rod is E = 200 GPa, elastic limit sp = 300 MPa?

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