Sunday, February 22, 2009

Giving 2D Walls 3D Thickness in AutoCAD


In this exercise, you learn how to change 2D wall lines into 3D wall lines by changing their thickness. The techniques demonstrated in this project can be used to turn almost any 2D entity into a 3D object.

    People often use the term extrusion for the process by which a user can increase the Z-depth of an object, but in AutoCAD, there is a command called EXTRUDE that extrudes a closed entity to create a solid. In order not to confuse you, we usually use the term extrusion only when referring to the process which requires the EXTRUDE command.

    AutoCAD refers to the distance between wall lines as the width of a wall, and the Z-depth of a wall line as the wall's thickness.

  1. Open the 7602a.dwg file.

  2. From the View menu, choose 3D Views then choose SE isometric.
  3. From the Standard toolbar, choose Zoom Window.
  4. Select two points, as shown in the following image, to define a window around the gap in the 3D building.
  5. From the Modify menu, choose Properties. This will launch the Properties window.
  6. Select the 2D wall lines indicated in the image. Make sure you get the small ones at the end of each window opening.
  7. In the Properties window, in the Thickness box, type 8'.
  8. Press ESC to remove the grips from the objects.

In the next tutorial you create 3D sills and headers.

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