Creating Temporary Plane for Rafters/Rafter-Supporting Purlins

Tool(s): Rafters + Rafter-Supporting Purlins

The position of the temporary planes is the region where the rafters will subsequently be placed.

To create a series of rafters using a temporary plane

1. In the Input options, click Custom to create a temporary plane.
2. Define the roof slope by specifying the Angle and the height of the Eaves.
3. Enter the temporary plane or placing region by
   • clicking an existing element or
   • entering a series of points.

     Use the tools in the dialog line and on the shortcut menu.

     

     When you draw lines and polylines, the following additional drawing aids are provided in the dialog line:
     

     Icon	Function	Use
     	No icon pressed in	The lines can be drawn at any angle. This is the default setting.
     	Enter at right angles	The line can only be drawn at right angles to the current system angle.
     	Cursor snap	The line can only be drawn at specific angles.
     15.00	Cursor snap angle	Define the cursor snap angle here (only possible when is enabled).

     At the same time you can enter a value to define a roof overhang.

4. Press ESC to finish defining the placing region.
5. Any outlines you enter now within the region will create recesses within it.
   Press ESC to finish entering.

   Note: The outline of the recess must be completely within the temporary plane or placing region. If this is not so, the program will issue a message.

   

   Several margins
   This message is displayed when the outline is not within the placing region.

   Polylines intersect
   This message is displayed when the outline and the placing region have a common edge or overlap.

6. Click on the outline of the eaves now to apply the slope for the plane.
   If you want the plane to pass through a specific point, click Set Point and then a point in 3D view.
   You can repeat this step as often as necessary. The current position and orientation of the plane in 3D space is visible if you are working in isometric or elevation view.
   If you do not define a slope, a reference line has to be defined prior to placing.
7. Press ESC to finish entering.

   Now define the rafters.