1V 5/8 sphere geodesic dome
Class I icosahedral breakdown, cut snapped to the nearest vertex ring (achieved portion 72.4%). 25 struts in 1 length, 11 hubs, 15 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 | 25 | 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 | 25 | 158 lin ft | 210 lin ft | 263 lin ft | 315 lin ft | 394 lin ft | 526 lin ft |
Cut lengths are hub-centre to hub-centre; subtract your hub's offset at each end.
Hubs
| Valence | Qty |
|---|---|
| 5-way | 6 |
| 4-way (base) | 5 |
| Total | 11 |
Panels
| Signature | Qty | Area (unit R) |
|---|---|---|
| AAA | 15 | 0.4787 |
| Total | 15 | 7.181 |
Proportions (per foot of radius)
- Height 1.447 × R · floor diameter 1.789 × R
- Surface 7.181 × 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.