1V 3/8 sphere geodesic dome
Class I icosahedral breakdown, cut snapped to the nearest vertex ring (achieved portion 27.6%). 10 struts in 1 length, 6 hubs, 5 panels. Strut length = chord factor × sphere radius.
Open this geometry in the studio
Struts
| Strut | Qty | Chord factor | 12 ft dome | 16 ft dome | 20 ft dome | 24 ft dome | 30 ft dome | 40 ft dome |
|---|---|---|---|---|---|---|---|---|
| A | 10 | 1.05146 | 6' 3 11/16" | 8' 4 15/16" | 10' 6 3/16" | 12' 7 7/16" | 15' 9 1/4" | 21' 0 3/8" |
| Total | 10 | 63 lin ft | 84 lin ft | 105 lin ft | 126 lin ft | 158 lin ft | 210 lin ft |
Cut lengths are hub-centre to hub-centre; subtract your hub's offset at each end.
Hubs
| Valence | Qty |
|---|---|
| 5-way | 1 |
| 3-way (base) | 5 |
| Total | 6 |
Panels
| Signature | Qty | Area (unit R) |
|---|---|---|
| AAA | 5 | 0.4787 |
| Total | 5 | 2.394 |
Proportions (per foot of radius)
- Height 0.553 × R · floor diameter 1.789 × R
- Surface 2.394 × R² · floor 2.513 × R²
Computed by DomeSketch from the icosahedral geometry; the 2V/3V/4V values match the published tables and the test suite asserts it.