Create a ramp in a plan or 3D view by sketching the run of the ramp or by sketching boundary lines.
Open a plan or 3D view.
Click Architecture tabCirculation panel (Ramp).
(Optional) To select a different work plane, click Architecture tabWork Plane panelSet.
Click Modify | Create Ramp Sketch tabDraw panel, and select either
(Line) or
(Center-ends Arc).
Place the cursor in the drawing area, and drag to sketch the ramp run.
Click
(Finish Edit Mode).
Tip: The default settings for the Top Level and Top Offset properties may make the ramp too long. Try setting the Top Level to the current level, and the Top Offset to a lower value.