Welcome to the debut posting for the CurtainwallBIM blog. Our software of choice is Revit and our goals are to address any BIM related curtain wall issues, disseminate CW related information, and to help solve any problems ourselves or through dialog with other blog followers. If you see a problem, or a better solution, please feel free to jump in and add your two cents. We'll start by demonstrating the solution to the problem of curtain walls automatically joining when their end nodes get close to one another.
Disallow Join to Prevent Curtain Walls From Attaching
In most cases, at an inside or outside corner condition, the ends of the adjacent Revit curtain wall objects should meet. A common issue arises when the two curtain wall objects end near each other, but are not intended to meet as shown below.
In this situation, when moving the endpoint of one CW object near the other, Revit will understand this to mean that the two walls should be joined and will move the endpoint of the unselected wall until it matches the endpoint location of the selected wall forming an intersection as shown below. This may cause a warning dialog box to appear if it overrides constraints for one of the curtain walls.
To avoid this situation, follow these steps:
1) Before moving the endpoint of one of the walls, select the wall then right-click on the blue circle at the endpoint. If you right-click anywhere except over the blue circle you will get a different menu,
2) From the menu that opens, select Disallow Join.
3) Repeat the process with the adjacent wall - both walls must have Disallow Join turned on.
4) Move the endpoints of the wall as required and they can be positioned without regard to the other wall's endpoint.
If the design changes and you need to join the walls, you can either right-click on the endpoint and choose Allow Join from the menu or click on the T-shaped icon that appears near the endpoint when the wall is selected.
This procedure works in a similar manner when curtain walls butt into each other rather than forming an intersection.