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Curtain Wall Tool Bug?
August 8, 2008
4:58 am
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July 9, 2008
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I am having some problems setting up a curtain wall at an angle.

1) If for example I setup a 10' curtain wall vertically, 90 degrees, everything is fine. But once I start changing the angle the height of the window gets thrown off. What I've concluded is that regardless of the window angle the height chosen is not for the height of the window but rather the overall vertical height of the window at the top and bottom exterior corners of the frames. Why can't it be the actual height of the window itself?

2) In addition, as you apply a greater angle to the curtain wall your base point of the curtain wall doesn't even come close to what is chosen. In my case I selected 0'-0" at 45 degrees to Project Zero and it ends up just "somewhere" in the vicinity.

3) The individual heights of the Secondary Gridlines on the Schemes Section of the Tool Settings are based on the distance between horizontal frames. This is confusing because the overall distance of the curtain wall from bottom frame to top frame is referenced totally differently than the individual Secondary Gridlines.

4) The angle of the curtain wall, once set, cannot be readjusted. Is there a way to fix this instead of deleting and replacing over and over again?

I've tried this on two iMacs. PPC and MacIntel. Same problem.

Am I missing something? This is forcing me to create mock outlines of curtain walls to pull dimensions to make them sit right. And I'm finding this to be very cumbersome. Help...please........

August 11, 2008
5:58 am
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Arath -

I am tied up giving a training today (Monday August 11) but will look at this tomorrow.

Re item 4, I believe that you can adjust the angle of a curtain wall by using the "free rotate" option in 3D.

I suggest you read through the section in the Reference Manual regarding curtain walls, since there is a wealth of examples and explanations of how to manipulate them (including what I mentioned above re free rotation).

Eric Bobrow, Principal, Bobrow Consulting Group – Creator of MasterTemplate – The Office Standard for ArchiCAD – http://www.bobrow.com http://www.actemplate.com

August 14, 2008
1:22 am
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I have done some more study of curtain walls and see that there are good ways to handle all your requirements.

1) You can select the option in the Curtain Wall System settings to make the frame go outside of the boundary, rather than inside. This will make your 10' high curtain wall be exactly 10' of glazing, and the frame will be outside (above and below) it, exactly as you prefer.

2) The line you draw in space to define the base surface of the curtain wall is called the reference line. The surfaces of the panels and thickness of the frames are offset from this line. You can see these delineated in the overall Curtain Wall System settings. If you want the panels to lie directly on that reference line, enter 0 for the "Panel offset" in the top section called "offset to Reference Surface".

3) The distances you specify for the gridlines place the lines themselves. The mullions (vertical dividers) and transoms (horizontal dividers) are centered on these gridlines; the boundary frame can be centered on them, or inside them, or outside them, whichever you prefer, as set in the Curtain Wall System setting (near the bottom) for "Place Boundary Frames."

4) Use the free rotate option to change the tilt angle.

There are about 45 pages in the reference manual for the various ways to define and manipulate curtain walls. These will answer many of your questions.

You might want to draw some section markers for temporary study purposes, one directly in front of the curtain wall, and one cutting perpendicular through it. Try making the boundary frame have a 0 thickness (that's the "a" parameter" in the frame size) and you'll make the boundary frame disappear and can study the panels themselves. The "d" parameter controls how far beyond the grid the panels will extend - make that 0 and the panels will precisely align with the boundary.

There are so many parameters, it is confusing at first. However, with study, it appears that the curtain wall tool works properly (I can't see any bugs in general) and allows ample options for precise placement.

Eric Bobrow, Principal, Bobrow Consulting Group – Creator of MasterTemplate – The Office Standard for ArchiCAD – http://www.bobrow.com http://www.actemplate.com

February 7, 2015
9:25 am
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Sorry for the thread necromancy but I just wanted to thank Eric for the tips. Had the same problem but now it's all done and over.
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