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fire box size.

sly anthony

Newbie
29
10
Joined Feb 12, 2014
I need help big time. i have exhausted my budget for my 250 gallon build and need materials for my fire box , i have 10 pieces of 18x20 1/4 in steel plates laying around, whats the best way to make the fire box using these without having to do too much cutting and joining?
 

kc5tpy

Master of the Pit
4,344
184
Joined May 12, 2013
Hello Sly.  A little more info would help.  Also include pictures and drawings including dimensions.  By conventional I assume you mean not reverse flow.  What will be your heat source, propane or charcoal?  There is a pit calculator that a few members are a whizz at using.  I have never used it but by bumping your post it should come to their attention.  The questions I asked are relevant for their answeres.  If you get no reply please PM me and I will ask them to have a look at your thread.  Good luck.

Danny
 

sly anthony

Newbie
29
10
Joined Feb 12, 2014
Thanks Danny, yess what i meant was an offset smoker. i will be using charcoal ( no propane short cuts for me ) lol.
 

kc5tpy

Master of the Pit
4,344
184
Joined May 12, 2013
Hello Sly.  Pictures, measurements, drawings and thoughts of what you are wanting to build.  These things help with answers given.

Danny
 

sly anthony

Newbie
29
10
Joined Feb 12, 2014
This info is from a plate on the tank

Length - 94 inches

water capacity - 250 gal

outside diameter - 30 inches

shell thickness - .199 inches

surface area - 61.5 square feet

i am planning to do two doors and four racks , no counter weights (yet !!!! ) . Hoping to get enough steel plate to do reverse flow if not offset it is . just found some 6 inch and 4 inch dia steel pipe for chimney ( which should i use ?)
 
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crazyq

Meat Mopper
264
19
Joined Feb 7, 2014
Roughly a 30x30x28 firebox size is what i would to aim for. That will put you at about 114%. I always like to run my FB's a little bigger then the calculator calls for.
 

daveomak

SMF Hall of Fame Pitmaster
OTBS Member
SMF Premier Member
25,645
3,132
Joined Nov 12, 2010
Sly, evening..... 250 gallon is pretty big for charcoal... FB... 30 x 30 x 24 is about the smallest FB you want to use...
FB/CC opening.... 231 sq. in. for a RF smoker OR a SFB with tuning plates...
 

crazyq

Meat Mopper
264
19
Joined Feb 7, 2014
Thanks Dave for mentioning that about the charcoal. i forgot to add in my post that with a cooker of this size you will want to burn logs/wood. No way youd be able to do it on charcoal alone i fear. At least it wouldnt be feasable.
 

sly anthony

Newbie
29
10
Joined Feb 12, 2014
right, now i have a problem for sure , gotta find steel for that size box. sorry about the charcoal , in the caribbean we charr the wood until it resembles charcoal, but it is still wood . i will post a pic so you can see what i am talking about , so i will be burning wood actually we just call it coals down here.
 

ribwizzard

Master of the Pit
2,183
84
Joined May 10, 2012
Well, 18 x 20, and you got ten? Then go 36" tall 36" wide, and 20 deep, all you can do. Then you still have to find a piece for the door, 36 x 36. The two you have left should be enough for the back, considering you will have the tank opening at the top rear.
 

sly anthony

Newbie
29
10
Joined Feb 12, 2014
i was thinking about 36x36 but i was wondering if the fire box would be too big for the cook chamber and also this height of the box now makes the smoker a little too tall to access from the ground as it will be trailer mounted. im only 5.8 tall
 

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