#11  
Old 09-15-2009, 10:59 PM
Journeyman
 
Join Date: Mar 2009
Location: North Louisiana
Posts: 305
Default Re: Casting a dome oven

i just finshed casting a 37" by 18" , 2 1/2" thick oven
i used the formula that dmum posted and it was bang on. i used all of the 12, 50lb bags of concrete.
you can check it out here:
http://www.fornobravo.com/forum/f43/...uild-7866.html (My Cast Refractory Oven Build)
plenty of pictures.

let me know if you have any questions that i maybe can help with.
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  #12  
Old 08-10-2010, 06:45 PM
sacwoodpusher's Avatar
Laborer
 
Join Date: Jul 2010
Location: Wilton, CA (Near Sacramento)
Posts: 69
Default Re: Casting a dome oven

((4/3)Pi Ro Cubed - (4/3) Pi Ri Cubed))

Volume of outer sphere -volume of inner sphere divided by 2 because you have a hemisphere.
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