Twice the number of struts and
hardware, and variable distance between the inner and outer domes makes
these structures suitable for dome homes or commercial buildings
where roof space for wiring, plumbing, insulation, ductwork, wiring
cables etc. is needed.
For greenhouse growing a super insulated
environment can be created if both domes are covered with horticultural
glazing or film.
For a soundproof interior a large amount of
sound barrier material can be added between exterior roof and
interior ceiling panels.
Click on images below for a larger view:
Our Double Dome example is a 4
frequency Octa - Dome = Octa Dome 4 Class I with normal orientation of
the
4 - way Connector on top. More about this
and other
Octa - Domes
here.
Proportions shown are for a 20 ft
diameter outer dome made from 2" x 4" standard framing lumber, with a
separate 2
x 4 inner dome, connected with 3 inch Connector Hubs that are 12 inches
long.
Double domes may have the same inner and
outer dome types, or they may be different.
They may be the same basic dome but with X
type variations [examples
]
on the inner and outer dome.
Or they may be Diamond Truss
domes, where a Class I and Class II dome joined at common
vertices is often found.
Double domes may be made with our
unique
hub connection system, using longer hubs to separate the two domes a
certain
distance. In the case of simple steel tube domes (without hubs),
spacing
is accomplished by using longer connection bolts and steel tube
spacers.
It is also possible to combine domes
such as a 2 x 6 outer dome and a 2 x 4 inner dome or a wood outer dome
and steel inner dome.
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