These next views illustrate the "shortened version" - bottom level
Base perimeter becomes slightly smaller than actual dome diameter.
For a 25 ft diameter dome, base perimeter will be 24 ft 2 inches from vertex to opposite vertex.
Height from ground to apex will be 9 ft 3 inches.
This is a low profile dome, ideal for high wind areas and for a short greenhouse with good floor area that is easier to heat compared to a taller dome. By leaving off the lower level of triangles on the Garden Dome 4, the dome height is reduced by approximately 3 ft 2 inches for the 25 ft diameter model.
Height is approximately 37% of actual Dome Diameter
Technical information about dome Class and Methodology and the 4 frequency icosa system
With 91 Connector Hubs and 250 struts, the Garden Dome 4 has
of parts! By following the economy parameter of sawing 2 struts per 8
board (2 x 4, 2 x 6 etc.), the dome diameter will be approximately 26
and only 125 eight ft. boards are required. One can see how a 30 to 40
ft dome could easily be achieved using longer strut lengths.
Using the Connector Kit and lumber purchased locally, the 26 ft 2 x 4 dome frame can be built for under $1,600.
20 ft 2 x 4 dome
17 ft 2 x 2 dome: Short Version | Hemisphere Version
See also: 12 ft aluminum Geo-Sphere