(Solved): 6-21. The beam supports a uniform dead load of \( 6 \mathrm{kN} / \mathrm{m} \), a live load of \( 2 ...

6-21. The beam supports a uniform dead load of \( 6 \mathrm{kN} / \mathrm{m} \), a live load of \( 20 \mathrm{kN} / \mathrm{m} \), and a single live concentrated force of 40 kN . Determine (a) the maximum positive moment at \( C \), and (b) the maximum positive shear just to the right of the support at \( A \). Assume \( A \) is a roller and \( B \) is a pin. Prob. 6-21