To apply a uniform load to a part of a member only, select the member. Then, open the "New Member Load" dialog box, for example, by clicking the  button in the toolbar. Select the Trapezoidal load distribution type in the list.\r Enter the load magnitudes p1 and p2. In the case of a constant load, enter the same values.\r Define the load distance according to the dialog graphic. The distances A and B refer to the member start.