Using the reference plane you can control the position of the extruded roof in relation to a level.
Revit roof reference plane.
Usually when i create a model in revit not necessarily a family i use reference planes as guides to constrain all other elements on them.
Reference planes add a reference plane use the line tool or the pick line tool to draw a reference plane.
Now the trick is select and name the ref.
First of all create a reference plane in desired position and if you like lock it to the roof plane this way if you raise the roof the purlins etc.
Click architecture tab work plane panel ref plane.
Sketch the profile of the roof as an open loop.
Name reference planes name each reference plane so you can assign it to be the current work plane.
In the drawing area select the arc line.
In the drawing area sketch a reference plane that is not perpendicular to the roof ridges.
Will go with it.
Click architecture tab work plane panel ref plane.
In the drawing area sketch.
Used in this way they are acting as simple construction lines.
Align roof ridges in a plan view add a reference plane.
Plane if you don t none of this works.
Simply they can be used to form a draft outline of where you need to position certain elements.
Revit places a reference plane at the specified offset.
To pick an existing line.
In the drawing area draw the reference planes by dragging the cursor.
Click finish edit mode and then open a 3d view.
If you specify zero segments the default a.
For example i may lay out the perimeter of my building and then align and lock walls floors ceilings and roofs even area boundaries on those reference planes.
On the properties palette specify a value for number of full segments.
Alternatively they can actually be used to control the formation and position of 3d geometry.
Hide the reference plane in the view hide a selected reference plane or all reference planes in.