Curtain System by Face, Grid Orientation

[vansicek]

I am using Curtain System by Face to make a curtain wall on sloped walls. I am having a problem with the default orientation of the mullions. Some of my faces have oddly angled tops and the vertical mullions seem to be looking at those edges to get something to be perpendicular to. 

The image attached shows the system I'm talking about. I need the vertical mullions to be perpendicular with the  ground, not the roof line. I have tried editing the grid itself, and I have heard that splitting the surface will not allow me to create a curtain wall system.

[v_chris]

This seems to be something autodesk has continually failed to address. For software, that is specifically designed for construction industry, Revit developers have singularly failed to provide a simple solution to putting a simple curtain wall (with straight lines) on an angled wall.  If we documented a high rise with a curtain wall that revit provides (without a tortured work around) we would be shot on the spot. 

[Fangchao.gong]

Seems that till 2016, we have still this issue...

[RDAOU · Accepted solution]

@vansicek

From the image you have posted; such orientation/pattern of the Grid/Mullions occurs ONLY when:

1. the curtain wall is inclined/slanted ie: top and bottom edges are not on the same vertical plane
2. or the curtain wall is following a free form surface determined single or double curves...etc

When the face of the Mass is not vertical/plumb; you cannot make the mullions vertical!!!! The mullions parallel to the V Grid will follow the plane/surface you which you've placed them on. In such case the orientation of the Curtain Grid is determined by the number of divisions required to host the curtain panels defined in the Curtain system properties (the angle option is not available in such case). ie: Revit divides the top and bottom edges of the curtain wall to an equal X number of divisions to fit an X No. of panels  

Vansicek wrote:

The image attached shows the system I'm talking about. I need the vertical mullions to be perpendicular with the ground, not the roof line. I have tried editing the grid itself, and I have heard that splitting the surface will not allow me to create a curtain wall system.

As clarified above; it is not possible...and the image you posted they are not vertical to the roof either.

PS: It is not REVIT which doesn't allow this...It is the Laws of Physics & Geometry ... to place a mullion vertical to the horizontal it has to be in a plane which is Vertical/Perpendicular to the Horizontal

@Fangchao.gong

There are no issues with what this OP is about ...At least not if one understands what he is doing and how the software computes and functions...(Geometric Shapes/Patterns are nothing but Physics and Math algorithms...hence; their behavior is predictable)

This post has really nothing to do with your issue related to the rotation angle of the curtain wall system. Sincere apologies...I skipped your post