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| NOTE: all figures have been rounded up to the next higher whole number | Inside Dome Shell | Outside Dome Shell |
| Diameter - Ground Level | 48 ft. | 50 ft. |
| Radius - Ground Level | 24 ft. | 25 ft. |
~~ Circle ~~ ( 'Pi' = P = 3.1415 ) ( radius = R ) |
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| Circumference of Dome = 2PR | 151 ft. | 158 ft. |
| Square Footage of 1st Floor of Dome = PR² | 1,810 sq. ft. | 1,964 sq. ft. |
~~ A Full Sphere ~~ |
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| Surface Area = 4PR² | 7,239 sq. ft. | 7,854 sq. ft. |
| Volume = (4PR³) / 3 | 57,905 cu. ft. | 65,448 cu. ft. |
~~ This DOME is 1/2 of a Sphere ~~ |
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| Dome's Surface Area = 2PR² | 3,620 sq. ft. | 3,927 sq. ft. |
| Dome's Volume = (2PR³) / 3 | 28,953 cu. ft. | 32,724 cu. ft. |
| ~~ Cement for DOME shell ~~ NOTE: the outside surface area of the dome shell was substituted as raw cubic feet. Then I applied a "Biddie" factor of 63% of the estimated cubic feet - it was based upon a rough average of the thickness of the cement in the dome shell (At least, I can be creative ....) |
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| Cubic Yards = cubic feet / 27 ( .63 )( 3927 / 27 ) |
92 cu. yd. | |
Cost of Cement ( depends upon vol.; starting est. of $105 per cu. yd. ) |
$9,960 | |
~~ Cement for DOME floor ~~ NOTE: The surface area of the dome's floor was substituted as raw cubic feet. Then I applied a "Biddie" factor of 40% of the estimated cubic feet - it was based upon a rough average of the thickness of the cement in the dome floor. |
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| Cubic Yards = cubic feet / 27 ( .4 )( 1810 / 27 ) |
27 cu. yd. | |
| Cost of cement ( approx. $105 per cu. yd. ) |
$2835 | |
~~ Cement for DOME foundation ~~ NOTE: no rough estimate yet |
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| Cubic Yards of cement | ??? cu. yd. | |
| Cost of cement ( approx. $105 per cu. yd. ) |
$ ?????.?? | |
~~ Additional Cement ~~ Utility Room and Floor, Other Augments, Rain lip, Porches, Garage Floor, Vent-i-Lite Cap NOTE: no rough estimate yet |
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| Cubic Yards of cement | ??? cu. yd. | |
| Cost of cement ( approx. $105 per cu. yd. ) |
$ ?????.?? | |
~~ Rebar for DOME shell ~~ |
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| Lighter weight rebar for Shell | ??? | |
| Heavier weight rebar for Shell | ??? | |
| Rebar for Dome Floor, Utility Room, Porches, Garage | ??? | |
~~ Monolithic Construction Crew ~~ |
??? | |
NOTE: The accurate figures will be reported as they are developed. |
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