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Arched Window Headers

Anonymous
Not applicable
For years I have been having the same problem when using a window with an arched header, in 3D the external wall material floods into the arch between the bottom of the header and the top of the window. This does not look right and despite requesting a fix nothing has happened. Does anyone else have the same problem, if so is there an easy option?
15 REPLIES 15

Anonymous
Not applicable
Hi John,

Welcome to the forum!

Can you attach a screenshot of the problem? Maybe someone will have a solution once they see it. Also it would be very helpful to note what operating system you are on, what version of ArchiCAD are you using, and exactly which window is displaying the problem.

Anonymous
Not applicable
Yes, I am running OSX 10.6.6 on a Mac Pro and using ArchiCAD v14. but have had this problem with earlier versions. As you can see from the attached image, with arched head windows the brick material runs through to the window head, but in the real world this should be part of the window material. I have reported this to Graphisoft, as have my support company, but nothing is ever done about it.
Arched Window Head.jpg

Anonymous
Not applicable
So far I have only used arched headers with arch top windows or arched openings so there is no gap to fill between the top of the sash and the arch. Have you checked to be sure there is no parameter to substitute another material in the library part? I assume you are looking for a break metal or mortar/grout fill or such.

Anonymous
Not applicable
Matthew, I have looked in the parameters of the window library and can't find a way of changing the material at all, it is a mystery that seems to baffle me. Has anyone else encountered the same problem?

Anonymous
Not applicable
Hi John,

It looks like there needs to be a new adjustable arched top window where the arch extends right through to the inside of the wall, and the infill piece forms part of the frame and is the same thickness. I've attached a real-life example I've encountered in an old farmhouse recently. I presume this is similar to the type of construction you require.

I think it would also be useful to be able to adjust the radius of the top curve on the other arch topped windows too. Not all are semi-circular in reality.

One way you could work around the limitation at the moment is to cut away the incorrect piece of wall above the window with a hidden complex profiled beam SEOed away from the wall, and then manually add in another piece of shaped beam to infill the gap again with the correct materials applied.

Anonymous
Not applicable
For clarity, here's a diagram showing the shape of the beam to cut away the wall at the top.

Hope that helps for the moment. Let's hope they introduce a window that can do this automatically soon! I wouldn't have thought it was a massive job for GS to slightly adapt the wallhole, as the 'W Arched Top Opening 14' window can do this shape already just without the frame.
Trad_Arch_top_window_cut1.jpg

Anonymous
Not applicable
Peter that is exactly the situation, and as an interim measure your measure will work, however I have recently been converting a Victorian Listed Building with many arched head windows, and this method becomes tiresome, especially when amending a scheme. It became essential to keep the 'infill' arches on a separate layer and amend individually. As I have explained to Graphisoft, parameters should be embedded within the window object to sort this out, but no one is taking any notice. I would appreciate it if anyone else with this problem can add it to a wish list for Graphisoft, as I have been for 2 or 3 years now. many thanks for your reply.

Anonymous
Not applicable
What part(s) are you using? It might be a simple fix in the GDL.

Anonymous
Not applicable
I don't know exactly which one John was using, but I was using was one of the standard rectangular casement windows, with the masonry arched header set to brick. ('W2 Casement' specifically, but all the rectangular ones act the same.)

uisanata
Contributor
Peter wrote:
Hi John,

It looks like there needs to be a new adjustable arched top window where the arch extends right through to the inside of the wall, and the infill piece forms part of the frame and is the same thickness. I've attached a real-life example I've encountered in an old farmhouse recently. I presume this is similar to the type of construction you require.

I think it would also be useful to be able to adjust the radius of the top curve on the other arch topped windows too. Not all are semi-circular in reality.

One way you could work around the limitation at the moment is to cut away the incorrect piece of wall above the window with a hidden complex profiled beam SEOed away from the wall, and then manually add in another piece of shaped beam to infill the gap again with the correct materials applied.



I need one of those, too. The SEO is not quite ok to use.
arch. ernest atanasiu

AC22/23/24 INT/GER/FR on Win 10 2004

Hobbesnb
Newcomer
Anyone know if this was ever fixed? Or has anyone with more GDL knowledge than I created a fix? I've got a lot of windows like this in a building and am worried the SEO load on my processor is going to make life difficult.
Scott Graham, AIA LEED BD+C
Principal | BIM Manager
Muhlenberg Greene Architects, Ltd.
Wyomissing, PA 19610

V6.5-19.0
Windows 10/Mac OSX El Capitan

Anonymous
Not applicable
Resurrecting another thread and wondering if there is a window that resolves this problem (arched timber to the head of the window)?

Lingwisyer
Virtuoso
You could possibly use an Arch Top Window and set the transom to be a solid panel in the same material as your frame. The down side of this is the limited window configurations available with the window type. You could also set your top frame to be the width of the widest part of the curve, then put a standalone Masonry Arch Segmental over that, though I figure that this might mess up things when you try to schedule your windows.



Ling.
AC18-23 AUS 7000
Self-taught, bend it till it breaks.
Win10 | E5620 x 2 | 24GB | K2200

Win10 | R5 2600 | 16GB | GTX1660

Anonymous
Not applicable
Thanks Ling, I'm surprised that it's not been addressed yet as it's a common feature for us to have to draw/model.

Lingwisyer
Virtuoso
Might be something to request from your local distributor as it maybe a common feature where you are, but not where the ArchiCAD development is based. I have not really delved into my distributors library, nor have I got access to the CADImage library, so there might be other solutions there.



Ling.
AC18-23 AUS 7000
Self-taught, bend it till it breaks.
Win10 | E5620 x 2 | 24GB | K2200

Win10 | R5 2600 | 16GB | GTX1660

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