2 Wooden platform
You will have to build something like that. Respect measurements
The posts can be posts of telephone in the center and the points
of the hexagon. To check the level and to fix with the need.
One nails above beams of approximately 10 X 10 to make the turn
and to connect to the center and intermediaries to support the
floor. If one must isolate, to nail by below what supporting
insulator and protecting from the rodents (plate of against fine
plate for example one will put insulator later)..
2 Concrete slab
To locate the site of the ends of the zome
and to dig light foundations. To put a concrete bottom. Remesurer
to locate a hexagon like below, to drive vertical metal stems
with the angles and to connect them by a string.
To cement one or two lines of concrete blocks
(10 cm to 20 cm broad) against the strings interior side, to
check the level.
One can make the flagstone later but if it is carried out, the
assembly will be more comfortable.
An insulator is better for a habitat, at least on 60 cm in perifery.
The flagstone it even is out of concrete cement (traditional)
but better out of natural lime + sand, or out of rammed ground,
or light concrete with shavings, or hemp, or clay, it will be