Pyramids are the simplest geodesic structures (1 frequency) that can be useful as geometry models, classroom sudy, a woodwork and construction project (do you need a reason to add to your tool collection?), or make a tent, shelter, greenhouse.

This pyramid has a vertical base tall enough to fit a standard door.

Shows proportions for a 2 x 4 structure. Pyramid struts and vertical
base boards are 87 inches long. The bottom floor is 7'-3" x 7'-3" square
= 52.5 sq. ft. of area. So you have a very square looking structure. Made
possible by our Patented construction connector system.

"X" type subdivisions can be added to give more structure and increased
strength; see TETRA
- HUT

**OCTA PYRAMID** - With -X3 Subdivision and FI struts. Only 9 Connector
Hubs required. A 2 x 4 Pyramid is illustrated, with a 16 x 16 ft base.
Height is 11 ft- 6 in. Use FI struts to support plywood cover panels or
greenhouse film or glazing. These can also be used to frame a standard
size rectangle window. See Tetra
Dome 3HZ-X1. A Base Perimeter can be made from RR ties, concrete blocks,
4 x 4 or 4 x 6 posts, or make wall forms for pouring concrete.

Click on these thumbnail images for a larger view:

A new design divides the faces into four equal triangles, making larger
pyramids possible. **More
>>**

This basic pyramid was made with 21 ft square aluminum tubes with a
top Star Connector.

Two Octa Pyramids can be joined to make the Octa
- Tetra Truss