The 25 ft diameter Garden Dome 2-X1
This size can be built using all 92-5/8″ standard lumber; qty. 105 required. Longest struts are about 89 inches.
FI (Face Intermediate) struts are shown, further dividing the right triangles. Use to support cover materials on larger domes.Bottom triangles have 2 rectangle sizes as an example of using FI struts to make a window frame for standard off-the-shelf windows.