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Made from the dynamic structure of the icosahedron.
The best low cost dome frame, simple and easy to build.
25 struts and 11 Connector Hubs make up the Icosa Dome framework.
Illustration of the 2 x 4 frame:

Diameter size is from vertex to opposite vertex.
Any size can be made with respect for material limitations (12 ft edges maximum)
Divisions of the -X1, -X2 and -X3 types (see below) can be done to add structure and strength.
It’s a simple, basic, inexpensive dome with lots of height.
Made from 1 x 2 to 2 x 8 wood depending on functional requirements.
The dome can also be made from steel conduit or aluminum hollow tubes.
The new Vertical Base Modification is a recommended option

Top view:


Front view:



Designated X1, X2, and X3. The original triangles of the dome are divided into 2, 3, or 6 equal triangles. Click on links for more details.

Icosa - Dome -X1


Icosa - Dome -X2


Icosa - Dome -X3


The Icosa-Dome made with standard 92-5/8″ lumber.
Struts are 2″ x 2″ lumber. Apex is 11 feet from ground,
diameter is 15 feet, floor area is 102 sq. ft.


New – more construction options and design ideas including the vertical base modification and joining domes in cluster groups>>