rhombicuboctahedron wooden greenhouse... 'help'

[sander wille]

hi,

My question is as followed:

I would like to know the angles for making separate triangles

like in the picture. So that it's easy to assemble or disassemble. 

I don't have that much of money.. so i don't want to mess this up.
If any of you guys can come with an answer I would be really grateful;

this is the link to the dome I want to build.

the size is correct: 6 m diameter.

https://simplydifferently.org/Geodesic_Dome_Notes?page=16#1V/L1 5/8 Rhombicuboctahedron Dome

[sander wille]

http://www.earthineer.com/blog/19636/geodesic-dome

this is the way I want to do it.. but there are no explanations on the web so far..  

[Paul Kranz]

Sander:

The triangle of the Rhombicuboctahedron is equilateral; all three angles are 60 degrees.

Paul sends...

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Very high regards,

 

Paul sends...

ReviveTheFlame.com

[Hector Alfredo Hernández Hdez.]

Know angles is not a good option.

Is better use lengths.

You will have less errors

[Ashok Mathur]

All the lengths of the squares and all the lengths of the equilateral triangles are same.

Ashok

Regards

Ashok

[Gerry in Quebec]

The construction method shown in the Earthineer blog you cited is the one used by Paul Robinson, a member of this group (though he hasn't posted here recently). If you go to his website, www.geodome.co.uk, you should be able to find a link to his video showing how to build the triangular wooden frames.

 

As far as I know, this method was initially perfected by Oregon Dome, a home-building firm in the USA. You have to bevel-rip all the triangle struts through their wide side to create the correct dihedral angles between triangles. For small domes, such as those Paul demonstrates in his video, this is no problem because the lumber stock is so small, e.g., 1.5" by 1.5". You don't need a huge table saw blade. But if you wish to use that method for a 6-meter diameter dome based on the rhombicuboctahedron, you will have very long struts and therefore will need more robust lumber stock such as 2x4 or 2x6, which are difficult to bevel-rip on a small-bladed table saw.

 

If you are able to bevel-rip such wider lumber, then I can help by providing the angles for the bevel rips and end cuts. You will also need to know the exact linear dimensions of the two template triangles (what Paul calls "patterns"). These lengths are calculated using the chord factors, the spherical radius of the dome, and the lumber stock dimensions.

 

There are a few earlier threads of Geodesic Help where we discussed the "Oregon Dome panel method". You should be able to find those posts using the Search function.

 

- Gerry in Québec

[sander wille]

Yes, I've tried to reach out to Paul.. but he doesn't respond.
i wanted to buy some plans of him. 

Thank you so much for all the info.
I'll reach out to you soon !

[Gerry in Quebec]

Here are pix of a little toolshed I'm now building using the Oregon Dome method of triangular panel construction ... more or less following Paul Robinson's video. I fabricated 18 triangular panels of two types, from 2x2 spruce, using two triangular templates. I connected the panels together with masking tape to make sure everything fit okay. Then I bolted them together and sheathed the triangles with half-inch plywood.

That dome section is now mounted on six 4-ft riser walls but I haven't taken a photo of it yet. The roof will probably be covered with cedar shingles.

- Gerry in Québec

[sander wille]

Very nice job Gerry!

Paul just added me on fb.
I hope he will answer my questions for the plans.
If not. Maybe there is a better way to chat and exchange info.

sincerely yours,

Sander