The 3 frequency geodesic tetrahedron with hexagon zenith (HZ) orientation.

Six lower main triangles are vertical.

Second row of triangles are all equilateral and top is a large hexagonal
cone.

The base perimeter is a perfect hexagon, illustrated here with a 3
ft Vertical Base Option (VBO).

Basic proportions as shown:Radius = 9' - 9"

Diameter = 19' - 6"

Longest strut is 117"

Dome height is slightly more than radius

Door opening is standard size ~ 32" x 80"

Base Option is 36"This size is ideal for adding a 3 ft Base Option and door, although a taller Base Option such as 4 ft can be used with a smaller dome diameter and still fit the standard door. If 8 ft lumber is used, maximum achievable diameter is 17 ft.

The simplified version leaves the main triangles - all that is really
required for a stable structure.

Build
the paper model

Some interesting options are presented in the next six pages >>