Modify Compound Walls

When editing the structure of a vertically compound wall, use the Modify tool on the Edit Assembly dialog to perform several functions, including changing the wall thickness, extending layers, and constraining a region.

To change a vertically compound wall, in the Edit Assembly dialog, click Modify. Then highlight and select either outer boundaries of the sample wall or borders between regions in the preview pane. Watch for tools and status bar messages that indicate what you are highlighting.

After you select a boundary, you can change thickness, set layer extension, or constrain a region's distance from the top or bottom of the wall.

Video: Modify the Vertical Structure of Walls

Allowing Layer Extension

If you select the horizontal outer boundary at the top or bottom of a layer, you can specify whether that layer can be extended.

Note: Layer extension does not work for walls attached to other elements, such as roofs, ceilings, or floors.

Select a horizontal boundary at the top of the wall, and a padlock displays. A locked padlock indicates that the selected layer cannot be extended. Click the padlock to unlock it, and the layer can be extended.

Unlocked layer indicating extendability

When you unlock layers for extension, 2 instance properties of the wall become enabled: Top Extension Distance (for layers at the top of the wall) or Base Extension Distance (for layers at the bottom of the wall). You can enter values for these properties in the selected wall’s Element Properties, or you can drag the unlocked wall layers in a view.

Note: Unlocked layers must be adjacent. For example, you cannot have one layer locked and its adjacent layers unlocked.

To drag wall layers

To drag wall layers, modify them in section, 3D, and elevation views.

1. Place the cursor at the top or bottom of the wall and press Tab until you highlight the shape handle for the extendable layers.

   Watch the status bar to be sure you are highlighting the shape handle.

2. Click to select the shape handle.
3. Drag the shape handle up or down.
   

   Dragging layers with the shape handle

Tip: If you join 2 walls and they both have a vertical extension, the extended portions will be horizontally joined. The extension joins must be the same, top-to-top or bottom-to-bottom.

Constraining a Region

To constrain a region a certain distance from the top or bottom of a wall, click the horizontal border between 2 regions. A blue control arrow displays. Clicking the arrow alternates the constraint from the top to the bottom and displays a temporary dimension that you can edit.

When a region is constrained to the bottom of a wall, the region is always the same distance from the bottom regardless of how high the wall becomes. Likewise, when a region is constrained from the top, the region is always the same distance from the top.

Use constraints to keep a trim border or a brick soldier course at a specific height at the top of a building or a CMU a specific distance from the base of the building. See Split Regions for Compound Walls.

Soldier Course Constrained to Top of Wall