Curtain Wall Junctions

A Curtain Wall Junction is an optional structure that serves to connect panels to each other in order to support or (more often) to substitute for Frames, resulting in a seamless, more lightweight structure than the traditional Framework. Junctions can only be placed at either or both ends of gridlines.

In ARCHICAD, a Junction is a GDL object. Its geometry and display attributes are all determined by their GDL parameters, which you can find in the parameter list of the Junction Type tab page.

Additionally, placed Junctions can be flipped to the opposite side of the Curtain Wall, and set up with a custom ID for listing and labeling.

Placement of Junctions

In ARCHICAD, Junctions can be placed either one by one or automatically at every intersection. Choose either of these options under Member Placement in Curtain Wall Settings.

When you choose At all Gridpoints, Junctions will be placed at every grid point at creation of the Curtain Wall, using the Junction defined on the Junctions page of Curtain Wall Settings.

Otherwise, the One by one option is applied: this means that no Junctions will be placed automatically, but you can place them one by one manually, using the Junction Tool and Junction Tool Settings available in Curtain Wall Edit mode.

Manually placed Junctions can be configured individually with custom properties in Junction Tool Settings, or else you can apply System-level Junction settings (from the Junction page of Curtain Wall Settings) by setting their Class as System Junctions.

Junctions are placed on the inside of the Curtain Wall by default.

To determine whether a given Junction belongs to the System or is a Custom Junction, open the Curtain Wall in Edit mode, select the Junction in question, open Junction Settings, and view the dropdown at the top of the dialog box: