This is how it’s done!
Spec’s24 foot inner diameter- 28 foot outer diameter- 24 inch walls-7 tons of rebar
2 foot stem wall -4 foot stem wall-ships door 30 X 66
The picture Gallery shows the Process of Building a 24 foot dome
We use a combination of steel and wood for the forms.
The domes are essentially built using two structures,
an inner form and an outer form. All you do is pour the concrete between them.
Not rocket science. You do need to use some trig to get the forms to fit.
An eighth inch off means 3 inches of accumulated error