We designed the Hepta Dome for a mid-size dome for a client using it at
It had to be:
1. Small enough to transport parts easily - dome fits in a van
2. Strong and resist desert winds and storms - wind resistant dome shape
3. Easily covered - minimal materials needed
Ern [founder of Garden Domes] had recently designed and developed
the hexagon based Tetra 3HZ dome and continued research on anti-prism
shapes. The result was the 7-sided heptagon, the heptagon anti-prism,
and with a conical top, he named it the Hepta Dome. Results were
positive and our client was delighted. We now offer this unique
one-of-a-kind dome for sale in Connector Kits and Frame Kits for
2x4 and 2x6 domes as the Heptadome. A steel tube version can be built
as well. Coverings and
entry/exit doorways can be made fairly simply.
An -X1 subdivision option is available. A 7 or 14-way top connector is
with our patented system. Connector hubs can be pvc, other plastic, or
metal. We recommend sch. 80 pvc or sch. 40 aluminum. It will make
a great greenhouse, gazebo, or other shelter.
Images from the Edome 3D model:
One can see how the lower triangles can be covered with a long
rectangle of material, making it quick and easy.
An option to the simple conical top is to use a short heptagram or
7-arm star- this is the dome + heptagram and we call it simply enough,
the Heptagram Dome
The 7-arm star dome is the Heptagram. It
has its own unique page.
The Heptagram + anti-prism base is
actually two structures joined together with short connecting struts.
14 connector hubs with 28 struts on bottom, and 15 hubs with 35 struts
on top, and 14 short connector struts between the two.
Turbocad Pro renderings of the 18 ft 2x4 Hepta Dome
This example has triangles within triangles, shown as thin rope that is
used to support a film covering in the large triangles and minimize
wind flapping. This can be done with eyelets and shock (bunjee) cords.
About 300 ft of cord/rope is needed.
Next is a photo of the original dome
See more at Customer's
A paper model
8 ft. wide material needed to cover- aout 112ft. needed -pdf
3 profile views- top, front, side -pdf
Ropes in the triangles -pdf
Some more cool here paper
llustration example shown with the -X1 option and double sliding
Buy this as an 18ft diameter, 2x4 dome you can build from the schedule
80 pvc Connector Kit with galvanized fasteners, construction book,
cover patterns, etc.
HEPTA STAR DOME