Answer:
- Define a plane that will be used to apply the load. You can do so by creating 4 corner nodes around your structure (Image 01).
- Go to Insert→ Load Wizards→ Member Loads from Area Loads. Specify the direction and magnitude in the Main tab (Image 02).
- Select the Geometry tab and select the corner nodes that were previously created. (Image 03).
- Select the Tolerances tab and enter a distance that will capture the entire width/height of the structure (Image 04). Click OK to exit.
- Right click on the area load and select Display separately. The area load is now displayed as member loads (Image 05).