Creating Curtain Walls with Autodesk Architectural Desktop
by: Ed Goldberg
URL: http://pointa.autodesk.com/gotoPointA.jsp?dest=15783

I get more questions about the Autodesk® Architectural Desktop implementation of curtain walls than on any other topic. Curtain walls as a modern building concept came into the architectural lexicon with the invention of steel frame and concrete frame buildings at the end of the 19th century.

Autodesk Architectural Desktop 3.3 has a complete Curtain Wall system. Besides the curtain wall itself, Curtain Wall objects are used as a framework or grid for the insertion of windows, doors, and window assemblies. As with many Architectural Desktop 3.3 features, users have found many uses for Curtain Wall objects other than those originally intended by the software developers. If you go to the free Download Center in the AEC section of Point A, you will find these objects used in several new ways. For example, one new Curtain Wall style is used to represent a CMU block wall, it even includes mortar joints, and another style is used to represent a railing.

In this tutorial, you will learn how to create a Curtain Wall object and set the object's Style properties.

Creating a Curtain Wall Object from a Layout Grid
1. Start a new drawing using the Aec arch [imperial] template, and select the Model Layout.

2. Select Desktop > Layout Tools > Add Layout Grid (2D) from the main menu to bring up the Add Layout Grid dialog box.

3. In this dialog box, set the following:

  • Shape = Rectangular
  • X-Width = 40'
  • Y-Depth = 20'

4. Place the grid in the model layout as shown in Figure 1.


Figure 1: Place a 2D layout grid in the model layout.
(click image to enlarge)

5. Select Design > Curtain Walls > Convert Layout Grid to Curtain Wall from the main menu (see Figure 2).


Figure 2: Convert the layout grid to a Curtain Wall object.

6. Select the 2D layout grid you placed in Step 4, and enter Y (for Yes) in the command line and press the Enter key.

7. Enter V (for vertical) on the command line and press the Enter key to bring up the Curtain Wall Style Name dialog box.

8. In this dialog box enter the name TEST CURTAIN WALL, and click OK.

The layout grid disappears, and the new curtain wall appears in the Plan View.

9. Place the curtain wall in an SW Isometric View by clicking the SW Isometric View icon in the View toolbar(see Figure 3).


Figure 3: The Curtain Wall object matches the layout grid, and the primary grid is vertical.

Setting Curtain Wall Style Properties
To set properties for a curtain wall style:

1. Right-click the curtain wall you just created, and select Edit Curtain Wall Style from the context menu to bring up the Curtain Wall Style Properties dialog box.

2. In this dialog box, select the Design Rules tab.

3. Click the Floating Viewer icon to bring up the viewer. Adjust the dialog box and viewer so you can see both of them at the same time (see Figure 4).


Figure 4: Place the Viewer screen next to the Curtain Wall Style Properties dialog box.
(click image to enlarge)

Notice that the Primary Grid Element drop-down list is set to Vertical Division, the Orientation icon is shown as vertical, and the Cell Dimension is set to 10'-0" (see Figure 5).


Figure 5: The Primary Grid Cell Dimension is 10'-0".
(click image to enlarge)

Watch the changes to the curtain wall in the viewer as you change the Design Rules.

4. Click the New Cell Assignment icon to create a new cell assignment.

5. From the Cell Location Assignment drop-down menu, select the Start and End check boxes (see Figure 6).


Figure 6: Click the New Cell Assignment icon to create a new cell assignment.
(click image to enlarge)

Notice the change in the curtain wall (see Figure 7).


Figure 7: The Curtain Wall object now has a new cell assignment.



6. Select Nested Grid from the Element drop-down list for the new nested grid (see Figure 8).


Figure 8: Select Nested Grid from the Element drop-down list.
(click image to enlarge)

7. Right-click the new nested grid, and name it SIDE LITE (see Figure 9).


Figure 9: Rename the new nested grid SIDE LITE.

8. Select SIDE LITE in the left Explorer tree panel to change to the SIDE LITE Design Rules.

9. Select New Division from the Element drop-down list, set the grid's Orientation to horizontal, and set its Cell Dimension to 5'-0" (see Figure 10).


Figure 10: Select New Division from the Element drop-down list.
(click image to enlarge)

Notice the change in the curtain wall in the viewer (see Figure 11).


Figure 11: SIDE LITE is divided into 5'0" horizontal divisions.

10. Click the New Cell Assignment icon to create a new cell assignment.

11. From the Cell Location Assignment drop-down list, select the Bottom and Top check boxes, which is similar to what you did in Step 3.

12. Rename the new cell assignment to SIDE WINDOWS, and select New Infill from its Element drop-down list (see Figure 12).


Figure 12: Renaming the new cell assignment as SIDE WINDOWS.
(click image to enlarge)

13. Click the SIDE WINDOWS icon, select Style from the Infill Type drop-down list, and select Windows Pivot-Horizontal from the Style list (see Figure 13).


Figure 13: Select Windows Pivot-Horizontal from the Style list.
(click image to enlarge)

Notice the change in the curtain wall (see Figure 14).


Figure 14: Pivot windows now appear in the Curtain Wall object.

14. Select the two left windows, right-click, and select Window Modify from the context menu to bring up the Modify Windows dialog box.

15. In this dialog box, change the Opening (percent) to 45, and click OK.

Notice the change in the curtain wall (see Figure 15).


Figure 15: Adjust the Opening angle in the Modify Windows dialog box.

Conclusion
Curtain walls are complicated, and that reflects how much customization of this building feature goes on during a typical project. But by now you're more comfortable with the basic curtain wall tools in Autodesk Architectural Desktop. We'll look at more curtain wall features in another tutorial. In the meantime, try my approach. Once mastered, and styles saved, Autodesk Architectural Desktop 3.3's AEC Curtain Wall system is sure to enhance your productivity.

Good Luck, Ed Goldberg.