Offset Smoker Build

Horizontal smokers with a side firebox and tuning plates.
Post Reply
lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Offset Smoker Build

Post by lewc » May 9th, 2019, 8:46 pm

Hi All, great site here. Lots of good info that I've been scrolling through. I thought I'd post my build here to get as much info as possible. I've posted on a few forums because I'm finding my way as I go, and searching for as much info as I can get.

So far, I've got some pipe, made a frame, made some wheels (using a CNC router cut jig), cut some circles and welded them to the cylinders. Next up is to cut the firebox to chamber hole and attach the firebox to the main chamber. I'll build the smokestack once it's assembled on the frame and cut the door.

The dimensions are 500mm (20") diameter for the chamber and firebox and the main chamber is 1000mm (40") long and fire box 500mm (20") long.

Any comments or info is appreciated. It's been a big learning curve to build this and I'm trying to smash it out so I can get cooking.
You do not have the required permissions to view the files attached to this post.



lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 9th, 2019, 8:56 pm

Pics
1.jpg
2.jpg
3.jpg
4.jpg
5.jpg
6.jpg
7.jpg
8.jpg
9.jpg
You do not have the required permissions to view the files attached to this post.



User avatar
Dirtytires
Expert
Expert
Posts: 2186
Joined: November 24th, 2015, 12:36 am
Title: It ain't broke...yet
BBQ Comp Team Name: Dont compete...cook for events once in a while
Location: Phoenix, Az

Re: Offset Smoker Build

Post by Dirtytires » May 9th, 2019, 10:19 pm

Looks like a great start.



User avatar
Pete Mazz
Moderator
Moderator
Posts: 2894
Joined: February 16th, 2013, 8:19 am
Title: Meathead
Location: Bucks County, PA

Re: Offset Smoker Build

Post by Pete Mazz » May 10th, 2019, 3:26 am

FB is too large. Figure 35% of CC volume for optimum size. Try the Pit Calc at the top of the page.


If it's tourist season, how come I can't shoot 'em?

Don't speak the language? Try this: Smoker Terminology

Try my SmokerBuilder Calculators

User avatar
ajfoxy
Expert
Expert
Posts: 2173
Joined: April 12th, 2016, 8:07 pm
Title: Neophyte Smoker Bldr
BBQ Comp Team Name: Not competing yet...
Location: Brisbane, Queensland, Australia

Re: Offset Smoker Build

Post by ajfoxy » May 11th, 2019, 5:26 pm

Nice little round bending jig you have there.


Learning generally boils down to "Repetition or the avoidance of pain", some people learn by doing, some by watching and some just have to pee on the electric fence.

Whether you think that you can, or that you can't, you are usually right. Henry Ford

lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 12th, 2019, 8:00 am

Pete Mazz wrote:
May 10th, 2019, 3:26 am
FB is too large. Figure 35% of CC volume for optimum size. Try the Pit Calc at the top of the page.
I found another build that used the same dimensions that I’ve been using for inspiration. What happens if the firebox is too large?



lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 12th, 2019, 8:03 am

ajfoxy wrote:
May 11th, 2019, 5:26 pm
Nice little round bending jig you have there.
Thanks. I used a similar idea to bend some round steel for hair pin legs. I thought it worth a go to see if it would work for flat bar. I was super surprised how easy it came together.

I originally planned to put castors on but kept doubting that idea. After not liking the prices of some vintage and new wheels I found, I had a go at making them.



User avatar
Dirtytires
Expert
Expert
Posts: 2186
Joined: November 24th, 2015, 12:36 am
Title: It ain't broke...yet
BBQ Comp Team Name: Dont compete...cook for events once in a while
Location: Phoenix, Az

Re: Offset Smoker Build

Post by Dirtytires » May 12th, 2019, 3:15 pm

What are you using as a steering a mechanism?



User avatar
Pete Mazz
Moderator
Moderator
Posts: 2894
Joined: February 16th, 2013, 8:19 am
Title: Meathead
Location: Bucks County, PA

Re: Offset Smoker Build

Post by Pete Mazz » May 13th, 2019, 3:55 am

I found another build that used the same dimensions that I’ve been using for inspiration. What happens if the firebox is too large?
The Chimney and Throat are calculated from the FB volume, which in turn is calculated from the CC volume. You can use a larger FB but keep the chimney and especially the throat at the recommended correct sizes or you'll wind up with increased airspeed thru the CC.


If it's tourist season, how come I can't shoot 'em?

Don't speak the language? Try this: Smoker Terminology

Try my SmokerBuilder Calculators

Chromeski
Expert
Expert
Posts: 474
Joined: July 20th, 2018, 6:59 pm

Re: Offset Smoker Build

Post by Chromeski » May 14th, 2019, 1:54 am

Great looking build.i trust Pete will steer you in the right direction. Many great builds never function properly because sizes are not correct.



lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 15th, 2019, 7:05 am

Dirtytires wrote:
May 12th, 2019, 3:15 pm
What are you using as a steering a mechanism?
Just going to weld on some sort of handle on the smokestack end. Nothing fancy.



lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 15th, 2019, 7:09 am

Thanks for the feedback.

How important is the shape of the firebox to cook chamber hole? According to Feldons calculator and the Pit Calculator here, I need a 50 square inch hole. Another forum build that uses the same dimensions has cut a rectangle the same size as I've cut a template for.

Is this going to work well or should I go with a semi-circle shape?
You do not have the required permissions to view the files attached to this post.



User avatar
Dirtytires
Expert
Expert
Posts: 2186
Joined: November 24th, 2015, 12:36 am
Title: It ain't broke...yet
BBQ Comp Team Name: Dont compete...cook for events once in a while
Location: Phoenix, Az

Re: Offset Smoker Build

Post by Dirtytires » May 15th, 2019, 10:16 am

Why not just use the overlap of the two tanks as an opening? This minimizes the contact area between the two and results in a little less metal-metal heat transfer.



User avatar
Big T
Moderator
Moderator
Posts: 5537
Joined: September 1st, 2013, 2:40 pm
Title: Go Getter
BBQ Comp Team Name: Backyard Boys
Location: Lower Alabama

Re: Offset Smoker Build

Post by Big T » May 15th, 2019, 4:11 pm

:yth: but to answer your question, the shape doesn't affect performance so yo can go with what ever you like.


Measure Twice.....Cut Three Times.

lewc
beginner
beginner
Posts: 8
Joined: May 8th, 2019, 5:27 am

Re: Offset Smoker Build

Post by lewc » May 15th, 2019, 9:11 pm

Dirtytires wrote:
May 15th, 2019, 10:16 am
Why not just use the overlap of the two tanks as an opening? This minimizes the contact area between the two and results in a little less metal-metal heat transfer.
I've already welded the end caps on. I was searching through so much info and came across a few builds that put the end caps on and then cut the opening.



User avatar
Pete Mazz
Moderator
Moderator
Posts: 2894
Joined: February 16th, 2013, 8:19 am
Title: Meathead
Location: Bucks County, PA

Re: Offset Smoker Build

Post by Pete Mazz » May 16th, 2019, 4:06 am

You should be using a 36 square in throat for that size CC


If it's tourist season, how come I can't shoot 'em?

Don't speak the language? Try this: Smoker Terminology

Try my SmokerBuilder Calculators

Post Reply

Return to “Standard Offsets”