Author Topic: Mobile Wood Fired Oven  (Read 3698 times)

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Offline bbqchinchilla

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Mobile Wood Fired Oven
« on: March 14, 2013, 11:20:50 AM »
Hello, I've recently started gathering supplies for building my own wood fired oven, right now I've got firebricks and refractory mortar... everything else I would assume I could buy locally... but I'm not even sure the amount of materials I will even need... Is there some kind of detailed (and straightforward) guide showing how to build your own and how to mount the oven on a trailer correctly (and safely)... I have looked around without much success trying to find something that actually just spells it out clearly and plainly. If anyone could point me in the right direction I would be very grateful.


Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #1 on: March 15, 2013, 11:54:43 AM »
Seems like people like to buy their ovens pre-built on these forums, but it doesn't make sense to me considering the materials are relatively cheap, (probably about 1000 bucks total for the materials and the trailer) and these companies charge 5000 and up for just the oven and then a thousand to ship it to you... and about 3x times that for the portable variety...

Offline breadstoneovens

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Re: Mobile Wood Fired Oven
« Reply #2 on: March 15, 2013, 12:27:15 PM »
That is a fantastic project!  Unfortunately there is no easy instruction to follow that I know of. I am sure there are other threads on this forum that more knowledgeable members may point you to.

People often buy casted ovens because once on the road you want to make sure you oven dome is not going to collapse.
Once you oven it nice and hot, the materials expended and you drive it on the road, what is going to do that the bricks are not going to get dislodge and fall?

I would be happy to help you build your mobile oven with what I know.

The first steps would be to have a drawing. Do you have a design, drawing and measurement for you oven already?
Did you already pick a trailer to mount it on?

Antoine
WFO cooking is about passion.

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #3 on: March 15, 2013, 12:43:23 PM »
Yes, I have an idea of what trailer I want (was told that NATM certified trailers are what is used by some of these portable oven companies), I just need to know how/where to mount the oven on the trailer so it rides properly. I know these guys are trying to make a living selling this stuff but it seems like a huge markup for what you're getting... (it's just a pile of mud in the end, afterall)... I guess I could make a circle to sort of figure out how much cooking space I'll need and base the dome around that... that's no big deal... but I've read that the dome has to rise in a certain height in order for there to be proper air circulation inside the oven... It's just these tiny details that could make or break the oven that I worry about...

Offline breadstoneovens

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Re: Mobile Wood Fired Oven
« Reply #4 on: March 15, 2013, 01:21:28 PM »
I know these guys are trying to make a living selling this stuff but it seems like a huge markup for what you're getting... (it's just a pile of mud in the end, afterall)... 
:-D Well I am one of these guys

That said I am on the forum to help.

For the placement, you want to do 40% of the weight distributed toward the back of the trailer and 60% towards the front. At the end the tongue weight should be right around 10% of your trailer. And that is not easy to do as I just built one.

For the height of the dome, you just opened a big can of worm :'(
Many people believe in a 63% door to dome ratio. I personally tend to disagree and have a few people testing it out for me.  :angel:
But you have the right idea, make a circle, build a sphere shaped pile of sand and place your bricks around it.

Can't wait for other members to chime in, that is going to be a fun one.

Let me  know what else you need.

Antoine
WFO cooking is about passion.

Online jeff v

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Re: Mobile Wood Fired Oven
« Reply #5 on: March 15, 2013, 01:40:55 PM »
... (it's just a pile of mud in the end, afterall)...

Yea, what could go wrong? :angel:

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #6 on: March 15, 2013, 01:43:46 PM »
Excellent, well if you don't mind me trying to attempt this myself I will definitely appreciate any guidance you can provide...

And as I was saying in the other thread, I need that trailer type that you said you custom order... but I don't want to pay high shipping costs... small trailers like that are around 800 or less locally, and I could just get one similar for probably even less than that... what are the absolute necessary specifications these trailers must have?

It appears that everyone puts the ovens on a flat metal sheet that has a lip... what are the specifications of that part and how does it attach to the trailer?
From what I've seen, they pour normal concrete in it, and then put the bricks on top of that and start building the dome on top of all this... is that correct?

And is it necessary to make a layer of insulating concrete around the refractory mortar and firebricks? That's also a step I was skeptical about...

I apologize for all the questions, this has been something I've been wanting to do for so long and it's a dream of mine to have my own portable pizza business... however, lack of money and knowledge has held me back for awhile... I appreciate all the help I can get.

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #7 on: March 15, 2013, 01:47:31 PM »
Yea, what could go wrong? :angel:

I would assume the dome could collapse...? Trailer would still be in one piece, however, and I'd be out for maybe a hundred dollars in refractory mud and concrete and probably a few weeks of time as well... not the end of the world :) Have you guys heard of people's domes collapsing, another guy that makes pre-built ones claimed to never have any of his collapse...

Offline breadstoneovens

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Re: Mobile Wood Fired Oven
« Reply #8 on: March 15, 2013, 02:06:48 PM »
Ask away, here for that  ;D

You won't find a quality trailer for $800. Yes, Lowe's may have one for $800 but the cargo weight it too limited.
You want a trailer with a 3k lbs axle minimum. The one on the picture is 3,5K lbs
You are already talking about pouring concrete, you may want to calculate your wait on your total project before buying the trailer.

Also unless you raise the bed of the trailer, you will brake your back using the oven. I recommend a 40" minimum oven floor height with jacks to raise you oven.

To attach the metal sheet to the trailer, you want to weld it. It is the safest.

For the oven you need to find a thread detailing the building steps. This one has a lot of pictures
http://www.pizzamaking.com/forum/index.php/topic,22618.0/topicseen.html

My advice, don't be cheap on the insulation or you will be sorry later. You really want to use ceramic fiber for the insulation as it is light weight and very efficient. For a trailer like that you want a minimum of 2" at the bottom and 3" on the top. More would be better.

What is the intended use of the oven? Is it for home or commercial purpose?

Antoine
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Online jeff v

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Re: Mobile Wood Fired Oven
« Reply #9 on: March 15, 2013, 03:29:35 PM »
I would assume the dome could collapse...? Trailer would still be in one piece, however, and I'd be out for maybe a hundred dollars in refractory mud and concrete and probably a few weeks of time as well... not the end of the world :) Have you guys heard of people's domes collapsing, another guy that makes pre-built ones claimed to never have any of his collapse...

What if that dome collapsed going down the highway? I've seen pictures where that happened and more-you should be able to search them. I've also seen people that have built ovens that seem to function fine. Whether it was simple or not I'm not sure.

My point was I think you need to think of it more than just slapping a "pile of mud" onto a trailer.


Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #10 on: March 15, 2013, 05:05:31 PM »
I probably won't be going on major highways anytime soon with it, but if it collapses I would just deal with it. *shrug*
You run the risk regardless of who builds it, eh?
I would rather spend a few hundred dollars repairing it than having forked out 20k from the get-go... (which is a price I have been quoted for a low-end portable oven shipped)

You may not see wood fired ovens as just a pile of mud, but to me the only complicated bit is making it portable... otherwise I could have already built this thing for home use purposes.
In the end, that's all they really are... I mean it's a pretty primitive form of cooking, eh? Why should something like that have to be expensive?
I guess a lot of people that build these things are on these forums and some of these points of view may not be popular with them... but I think for people with small budgets (like me), these facts are important to talk about...

Offline shuboyje

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Re: Mobile Wood Fired Oven
« Reply #11 on: March 15, 2013, 05:29:16 PM »
You are correct, a wood fired oven at it's simplest is a cavity surrounded by dense thermal mass surrounded by insulation.  Making one that will be worth a damn for commercial purposes is going to take a lot more then that, and a LOT more then $100 in refractory.  Using the cheapest refractory I can source locally to build a small low mass oven you would spend at least 3 times that.  A oven big enough to do commercial quantities with enough mass to maintain heat for long events would at least double that number.  Still cheaper then buying, but no where near $100.
-Jeff

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #12 on: March 15, 2013, 05:37:03 PM »
Can't you just use red clay brick/firebrick for the dome and just use refractory mortar to keep it altogether? I can buy 50lbs of refractory mortar for 65 bucks... How much do you estimate one would need using this method?

Offline shuboyje

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Re: Mobile Wood Fired Oven
« Reply #13 on: March 15, 2013, 05:52:16 PM »
A few people have brick and mortar mobile ovens, but they are the extreme minority.  Brick and mortar just isn't made to roll down the road.  Ever seen a brick modular home?
-Jeff

Offline dineomite

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Re: Mobile Wood Fired Oven
« Reply #14 on: March 15, 2013, 07:03:36 PM »
A grand out the door?!?!? Let me know before you head out on the road, that way I can make sure I'm safe at home.

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #15 on: March 15, 2013, 09:45:29 PM »
These are very strange responses... would think people would strive to build their own for as cheap as possible...? Shuboyje, all the portable wood fired ovens I've seen are made of brick and mortar... which ones are you referring to?

Offline shuboyje

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Re: Mobile Wood Fired Oven
« Reply #16 on: March 15, 2013, 10:10:08 PM »
I'm looking at 99.9% of mobile ovens in this world including every single one owned by a member of this site that I know of.  Where are you seeing brick and mortar mobile ovens?  Are you clear on the difference between a brick and mortar oven and a modular oven? 
-Jeff

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #17 on: March 15, 2013, 10:31:37 PM »
I'm looking at this forno classico "modular" wood fired oven, and it's clearly made out of bricks and mortar... otherwise I'm not sure what you mean (or why it's relevant)

Offline JConk007

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Re: Mobile Wood Fired Oven
« Reply #18 on: March 15, 2013, 11:11:56 PM »
 ??? Brick and Mortar being not Cast in a mold or solid type one concrete pieces Brick being brick which is not meant for the rigors of the road the FGM is Modular oven with a brick finish. PicolonForno classico is a ?
John
I Love to Flirt with Fire! www.flirtingwithfirepizza.com

Offline bbqchinchilla

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Re: Mobile Wood Fired Oven
« Reply #19 on: March 15, 2013, 11:56:48 PM »
Okay, so when it's got a mold around the bricks and mortar, it becomes a "modular oven"... (which is still made of bricks and mortar) Can you understand my confusion? You guys shouldn't assume that people know all the phrases and such that you all know, eh? I planned on putting an insulating layer around the bricks... is there some kind of difference?


 

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