Spherical Dome Calcs Reference
 Diameter
 Diameter of the base of the dome. (see diagram above)
 Height
 Height of dome from base to apex. (see diagram above)
 Stemwall

 Vertical wall equal in diameter to the base of the dome extending
from the base down to the ground. For hemispheres  where the height
is equal to half the diameter  the stemwall can usually be inflated
as part of the Airform. For lowprofile spheres, the stemwall will have
to be built before inflating the Airform  this is the Orion style
dome (see Italy High
School). For Orion style Monolithic Domes, you must make the Stemwall
tall enough to accomodate a doorway  usually 8 feet minimum. For Airform
style Stemwalls, it can be any height. (see diagram above)
 Radius of Curvature
 The distance to the center of the sphere described by the dome. Spherical
domes are part of a larger sphere. For a hemisphere, the radius of curvature
is equal to the height and equal to the radius of the base. (see diagram
above)
 Circumference
 Distance around the perimeter of the dome.
 Floor Area
 Area of the floor. The floor is defined as a circle equal to the diameter
of the base of the dome.
 Surface Area
 Dome, Stemwall, and Total Surface Area describe the surface area of
the dome and stemwall separately and then totals the two together.
 Volume
 Dome, Stemwall, and Total Volume describe the cubic volume contained
by the dome and stemwall separately and then totals the two together.
 Level
 The level above the base of the dome to calculate radius and area.
(see diagram above)
 Radius @ Level
 The horizontal radius at the 'Level' specified. (see diagram above)
 Area @ Level
 Area of the circle described by the Radius @ Level. (see diagram above)
Oblate Ellipsoid Dome Calcs Reference
 Diameter
 Diameter of the base of the dome. The semimajor axis (a) of the ellipsoid
will be defined as half of the diameter. (see diagram above)
 Height
 Height of dome from base to apex. The semiminor axis (b) of the ellipsoid
will be defined as equal to the height. (see diagram above)
 Stemwall

 Vertical wall equal in diameter to the base of the dome extending
from the base down to the ground. For halfellipsoids  where the height
is equal to half the diameter  the stemwall can usually be inflated
as part of the Airform. These formulas are setup to only calculate halfellipsoids.
Orion style walls may be built if you choose, however, low profile spherical
domes may be more appropriate. (see diagram above)
 Ellipticity
 The ratio between the a and b of the ellisoid shape where 1.0 is a
sphere, 1.35 is a moderately elliptical dome, and 1.45 is a highly elliptical
dome.
 Circumference
 Distance around the perimeter of the dome.
 Floor Area
 Area of the floor. The floor is defined as a circle equal to the diameter
of the base of the dome.
 Surface Area
 Dome, Stemwall, and Total Surface Area describe the surface area of
the dome and stemwall separately and then totals the two together.
 Volume
 Dome, Stemwall, and Total Volume describe the cubic volume contained
by the dome and stemwall separately and then totals the two together.
 Level
 The level above the base of the dome to calculate radius and area.
(see diagram above)
 Radius @ Level
 The horizontal radius at the 'Level' specified. (see diagram above)
 Area @ Level
 Area of the circle described by the Radius @ Level.
