Re: 3V Geodesic Hexagon Dome House Plan

[MUHAMMED ZAHID ZORLU]

hello, I am looking for a 3V or 4V hexagonal frameless geodesic dome house plan with a diameter of 3 meters or 4 meters, can anyone help?

23 Haz 2023 Cum 14:34 tarihinde MUHAMMED ZAHID ZORLU <b2001...@subu.edu.tr> şunu yazdı:

hello, I am looking for a 3V or 4V hexagonal frameless geodesic dome house plan with a diameter of 3 meters or 4 meters, can anyone help?

[Ashok Mathur]

Dear Mahummed,

I hope can clear certain things so that you can find what you are looking for.

First a diameter of 3 or 4 meters is just too small for a dome house. 

In a 3 meter dome house you will find it uncomfortable to even extend your hand side ways.

If you know the size of a conventional rectangular house that you are comfortable with, you can express the dome size as covering xyz sq meters or sq ft.

Or look at a dome of 7 meters diameter as a minimum and about 20 meters diameter as a large home.

Domes need a continuous tension ring so most dome plans are not frameless but are made of timber or iron-angle or iron tubes or similar materials.

The exceptions are the thin layer domes produced by an American company that inflates a ballon under the dome while the cement stabilizes. They have many floor plans available but are not do-it-yourself domes.

Hope this helps.

Regards

Ashok

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[MUHAMMED ZAHID ZORLU]

hello Ashok, thank you for your help, but a dome with a 3V and 4 meters hexagonal diameter is enough for me. I add the image of the dome I want to you, I hope you have a plan for you, but I couldn't find it on the internet. Do you have this project or do you know where I can find it?

23 Haz 2023 Cum 14:52 tarihinde Ashok Mathur <ashokch...@gmail.com> şunu yazdı:

To view this discussion on the web visit https://groups.google.com/d/msgid/geodesichelp/CAD-a3OgqKT24uuy7aJp-b1X03mdxeQotV7U6JC_08R4fs-HBOg%40mail.gmail.com.

[Ashok Mathur]

Dear Muhammed,

You have stated two parameters for what you want.

Firstly it’s 3V dome 

Secondly its diameter is 4 meters.

Such a dome is very easy to construct either in wood or ms iron.

3V domes do not truncate at half height. They are either 3/8 or 5/8 in height. 

You should look at 5/8 option.

Such domes need struts of 3 sizes if you are willing to live with a little uneven floor joint.

If you want a flat floor, you need 4 sizes of struts which is not a big deal.

A good site to see first is domerama.com and look for 3v calculator. In the calculator enter the radius of your dome, say 2 meters and all the three lentghs will be calculated. An assembly plan will be shown.

Do this and ask more questions later on.

Ashok

Sent from my iPhone

On 23-Jun-2023, at 5:29 PM, MUHAMMED ZAHID ZORLU <b2001...@subu.edu.tr> wrote:



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<IMG-20230615-WA0001.jpg>

[Dx G]

Just a fine point - Actually a 3f ico class 1 will truncate in half in an edge up configuration, but the panels at the bottom complicate matters.  The traditional "3/8" or "5/8" only need two triangle sizes, so they are a lot more common.

-DxG

[Ashok Mathur]

The distinction is noted

Can you make an assembly plan for such a rotated 3v dome - similar to what Domerama has fort vertex up dome?

Thanks

Ashok

Sent from my iPhone

On 24-Jun-2023, at 7:51 AM, Dx G <yipp...@gmail.com> wrote:

Just a fine point - Actually a 3f ico class 1 will truncate in half in an edge up configuration, but the panels at the bottom complicate matters.  The traditional "3/8" or "5/8" only need two triangle sizes, so they are a lot more common.

To view this discussion on the web visit https://groups.google.com/d/msgid/geodesichelp/918e621d-c083-4e2d-a9cd-23e25077c271n%40googlegroups.com.

[Gerry in Quebec]

Hello Muhammed,

Here's a conversation (thread) that ran from January 22 to February 21, 2016. It has about 70 posts and includes a number of downloadable files.

https://groups.google.com/g/geodesichelp/c/hvRPHGNKxiY/m/kmtrSB7gBAAJ

The I {2,2} polyhedron discussed here has the same overall geometry as the one you want to build as a small dome home. You should also check out Rob Clark's designs here on Geodesic Help.

One thing to remember: hex-pent domes using the hub & strut method, rather than the panel method, require very strong hubs. Even at a diameter of 3 or 4 meters, you might consider building a more traditional geodesic dome with triangular faces.

 Good luck,

- Gerry in Québec

 

[Dx G]

I'll see if I have any digital renditions.   This was illustrated very well at WorldFlower Garden Domes, Ernie Akin, but that site came down some time ago and I haven't yet seen an archive anywhere. He had a lot of very interesting dome configurations and useful information on the site. However, you can always just tip a soccer ball in an edge-up orientation to visualize this. A lot of them are 3f ico class 1.

DxG

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[Gerry in Quebec]

Muhammed,

A few more comments on your dome project....

If you construct a half-sphere, then the dome height will be half the floor diameter. So a dome with a diameter of 4 metres, for example, will be only 2 metres tall. As Ashok suggested, you need to consider building something bigger than a 4-meter diameter dome.

 At a diameter of, say, 6 metres, the longest struts in the I {2,2} hex-pent dome would be about 127 cm and the shortest would be about 54 cm. That size of dome would have an outside floor area of about 27.6 sq. m.

- Gerry in Québec

[Gerry in Quebec]

Muhammed,

A small dome home based on the truncated icosahedron, aka, the Buckyball, might be a viable option. A photo of a Japanese community centre based on that polyhedron was posted by William Fisher around Dec. 19, 2014 on Geodesic Help. Here's a link to the architect's website:

https://www.archilovers.com/projects/128924/odense.html

Here's a description that was lurking in one of my dome files:

"This geodesic dome structure was designed by architect Munemoto Shinsaku to serve as a community centre for residents of the Temporary Shelter 2 at Omoe on the outskirts of Miyako City, Japan. Odense translates as Welcome which is fitting as this is essentially a community centre built by volunteers with donated funds. Munemoto Sinsaku was still at university at the time of the Great Hanshin earthquake back in 1995 but was able to help out and contribute this design for the Odense centre during the Tōhoku earthquake of 2011."

There may be simple construction details and dimensions here on Geodesic Help for a panel dome of this type.

- Gerry in  Québec

[Gerry Toomey]

And here are a photo and drawing....

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[Dx G]

Rather reminds me of Hexadome (Hopster), which was popular for a while.  There was a book out that described their dome, but I did notice that the panels were big/heavy and often pictured with a crane used to place them.

  As we often do, we all benefited from Gerry's commentary on this. 

https://groups.google.com/g/geodesichelp/c/OqqRfmAxO9E

DxG

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[SHAE toon]

I would like to make this dome. Have u shared plans for it?

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[Gerry Toomey]

Hello Shae Toon,

The attached illustrated Excel calculator isn't a detailed dome home plan, but it allows you to calculate key dimensions of a Buckyball / soccer ball dome (aka part of a truncated icosahedron). The first sheet shows you how to make a panel dome by cutting struts and internal support studs, which involves compound angles, easily cut on a compound mitre saw. There is one design variable (in a bright green cell), namely the dome's spherical radius. 

The second sheet, which has four design variables, again shown in green, gives a few pointers on ripping lumber for an alternative construction method popularized by Oregon Domes in the USA, and later used and illustrated by Paul Robinson of Geodome, in the UK. (See his Youtube videos.)

The  attached spreadsheet is best viewed in Microsoft Excel, the program in which the calculations and drawings were done. If you try to use an on-line spreadsheet viewer, the spreadsheet layout and drawings might be distorted or otherwise altered.

- Gerry in Québec

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