Modeling
About Archicad's design tools, element connections, modeling concepts, etc.

How do I model this organic shaped roof?

Anonymous
Not applicable
Hi all

I have made a concept model in MoI3d (moment of inspiration) of a large building that has an organic shaped roof. I would now like to take the form over to Archicad 12 to continue developing the design.

Can anyone help me with ideas about how to go about doing this?

I can convert using Rhino or C4D if needed but im just not sure how archicad can best handle these forms, especially as a roof.

Is mesh to roof the best route and if so .. how do i do it?

Can the curtain walling tool do this type of roof?

Im thingking that it will be a gridshell type roof eventualy so this is what I would like to be able to incorporate in the model if possible;

Any advice much appreciated.

Lucy
16 REPLIES 16
Dwight
Newcomer
Just to clarify: these blobby things are about exploring form, not building. It isn't fair to ask a student how they will build something because they really have no answer for that.

I figure that all a student really needs to say is "SchpritzenDraht" because that was good enough for our recently-deceased Sydney Opera House competition winner even though in the end expensive thick, complicated tapering arches were needed. Who would bother to go if there was no scandal? It brings the tourists out.
Dwight Atkinson
Anonymous
Not applicable
Chicken Wire: Blues Brothers
Anonymous
Not applicable
Clouds,

You can make that.

But first... as has been duly noted... You'll want to decide on it's construction. Will you use laminated beam webs with a sheathing system laid across? Or will it be ferrocement?

If you go beams / sheathing, you'll need to model each beam. That will also allow you to derive views of the beams with the section tool, which will become shop drawings. You'll have to use the mesh tool to create the sheathing assembly. That will have thickness, most likely, so you'll need TWO meshes... one to serve in the model and another, slightly smaller, to subtract from it in a solid element operation. The 'cutting body' mesh is placed on 'hidden' layer (one that you normaly keep turned OFF). After the subtract, you'll have a thin, organic shaped shell.

WARNING - this will be EXTREMELY tedious, but it CAN be done... I've done it. The fineness of any curves will be dictated by how willing you are to juggle the hundreds of little points involved. You will, however, find that you don't need as many as you might think... particularly where the curves are less extreme.

For a ferrocement construction, you just need the meshes, of course. And the bottom mesh will need to be carefuly constructed to follow the engineer's parameters for shell thickness, edge beams, etc.

In certain software packages (like MaxonForm), you can actually convert the shape you've created to a GDL. That's fine, but you don't have a lot of 'control' over it, like you do with native tools.

Dwight will now proceed to kick my butt down the street for encouraging organic behaviors...... Can I just do it until I need glasses, Dwight?

AND... as always, I pull out my organic Howitzers... John Lautner and Ken Kellogg. If you like sexy curves, look these guys up. They'll make you
Personaly, I love Kellogg's later stuff... It friggin' rocks. Most original guy out there today, IMHO.

Good seeing you guys again.... I've actualy been very busy in spite of economic conditions... I'm just amazed. I've got to come back more often... I miss you guys and gals.



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Dwight
Newcomer
Dave wrote:

Dwight will now proceed to kick my butt down the street for encouraging organic behaviors...... Can I just do it until I need glasses, Dwight?
My Peeve: Naive designers use software to make kidstuff forms without understanding the financial or technical ramifications of those forms. And we all love to explore form as if it was sculpture. Just make a good reason for why it isn't an extrusion or a flat panel.

Attached: beautiful but criminal distortion of a beam, justified by its ability to draw out the rubes.
Dwight Atkinson
Anonymous
Not applicable
Such forms should be modelled in other appications, AC is just not the right one for them. You have already modelled it, so export it to 3ds or dwg and import it in AC. Almost all applications can export to 3ds or dwg.

Once in AC, it is almost impossible to change the form, but you already have made it! What you can do is make holes into it for doors and windows. You can also produce nice floorplans, sections and elevations. Usually 3D modelling software cannot make architectural floorplans and sections.

Don't forget to model the form hollow inside and with a thickness for the walls and roof!
Anonymous
Not applicable
Dwight,

Do I get a cape and armored suit with the 'Organo-Boy' title? How's about some X-ray vision or bullet-proof flesh???

C'mon.... I have to get SOME return on this!

I agree... the pic you posted is... uhhh.... obscene.

Happy New Year, guys.
Dwight
Newcomer
"Organo-boy" wears this:
organo-boy uniform.jpg
Dwight Atkinson