Author Topic: chimney design- Top or the arch ......  (Read 684 times)

0 Members and 1 Guest are viewing this topic.

Offline dheeraj

  • Registered User
  • Posts: 55
  • Location: secunderabad
  • I Love Pizza!
chimney design- Top or the arch ......
« on: February 11, 2014, 11:23:17 AM »
hi friends
my 44 inch low oven is underway, just wanted to confirm few things. just had a word with my mason and he suggested i go for a traditional chimney and not the one which has chimney on top i am also attaching a pic for Ur understanding
picture  1

as per his recommendation its better to avoid this chimney as it travels over the dome there by heating the top side which will weaken the dome underneath  ( dome is heated and as the hot air flows over the tops gets heated and weakens the structure)
his advise is to go for a exhaust right on top of the entrance the 3 rd pic would explain better personally like the picture 1 design as it looks goods
pls comment
 


Online stonecutter

  • Registered User
  • Posts: 816
  • Location: SC
    • Old World Stone & Garden
Re: chimney design- Top or the arch ......
« Reply #1 on: February 11, 2014, 11:55:46 AM »
Your masons reasoning doesn't make sense.  I have a  suspicion he doesn't have much knowledge of oven building or the dynamics of how they work.

That aside, don't risk forcing him to build a squirrel tail flue, a front vent works just fine.
http://oldworldstoneandgarden.com/


When we build, let us think that we build for ever.
John Ruskin

Offline Tscarborough

  • Lifetime Member
  • Global Moderator
  • *
  • Posts: 3549
  • Location: Austin, TX
    • Pizza Anarchy
Re: chimney design- Top or the arch ......
« Reply #2 on: February 11, 2014, 12:06:54 PM »
Either is fine, but if doing an over the top vent, insulate between the vent and the dome.  Not because it weakens the dome but because it bleeds heat up the chimney.

Offline TXCraig1

  • Registered User
  • Posts: 13332
  • Location: Houston, TX
Re: chimney design- Top or the arch ......
« Reply #3 on: February 11, 2014, 08:41:37 PM »
Having a large enough chimney opening is a far more important factor unless you like a black faced oven.
Pizza is not bread.

Offline dheeraj

  • Registered User
  • Posts: 55
  • Location: secunderabad
  • I Love Pizza!
Re: chimney design- Top or the arch ......
« Reply #4 on: February 11, 2014, 09:15:31 PM »
i have ordered cast iron door which is 30 inch by 20 inch and opening of 18 by 9 inch , the challange is how is he going to fit the door to the front  vent chimney , will be great if some one could give even a rough skech it for 44 inch dome and 16 inch height

i have put all specs i guess

Offline dheeraj

  • Registered User
  • Posts: 55
  • Location: secunderabad
  • I Love Pizza!
Re: chimney design- Top or the arch ......
« Reply #5 on: February 12, 2014, 09:16:22 AM »
hoorray i have managed to convince my mason that squril is indeed possible and does not have any design probs, so no to front vent chimney actualy i loved the squril design
now i have understood the process until the squril vent is made, but how is the rest of the dome covered or built, i am sure u cannot pack it with mortar it will lots of weight on the dome, could u pls telll me how its done

Offline Tscarborough

  • Lifetime Member
  • Global Moderator
  • *
  • Posts: 3549
  • Location: Austin, TX
    • Pizza Anarchy
Re: chimney design- Top or the arch ......
« Reply #6 on: February 12, 2014, 09:35:32 AM »
You could literally put 10,000 pounds on the dome and it would not hurt it.  I attached a pic showing the insulation and refractory mortar floor of the vent.

Online stonecutter

  • Registered User
  • Posts: 816
  • Location: SC
    • Old World Stone & Garden
Re: chimney design- Top or the arch ......
« Reply #7 on: February 12, 2014, 09:59:46 AM »
You could literally put 10,000 pounds on the dome and it would not hurt it. 

 :-D

http://oldworldstoneandgarden.com/


When we build, let us think that we build for ever.
John Ruskin

Offline dheeraj

  • Registered User
  • Posts: 55
  • Location: secunderabad
  • I Love Pizza!
Re: chimney design- Top or the arch ......
« Reply #8 on: February 13, 2014, 07:51:37 AM »
yeah am glad to hear that (gods most wonderful creation.....brick dome) ha ha ha
but i am planning to have a steel table and pouring mortar around the vent would unnecessarily put weight on the stand any thing else in mind,
what is the process between pic 1 and picture 2
how does the dome take shape
« Last Edit: February 13, 2014, 08:55:09 AM by dheeraj »