Space truss is created with the Space Truss command.
Location of the Space Truss
You can access it under the ribbon menu, Steel tab, Macro heading.
Click the Space Truss icon under the Steel menu with the left mouse button.
Give points 1 and 2 in the plan. The direction of the 1st and 2nd points will refer to the column of the space truss. In the space truss settings, the information about the column will be applied for this direction.
Then drag the mouse cursor to give the 3rd and 4th points. The direction of the 3rd and 4th points will refer to the line of the space truss. In the space lattice settings, the information about the row will be applied for this direction.
When the process is complete, the space truss will be drawn.
Establishing the first two points that determine the direction of the space truss
Determining the line length of the space truss with the third point