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Q-talk *ON TOPIC ONLY* QUALITY ON TOPIC discussion of Backyard BBQ, grilling, equipment and outdoor cookin' . ** Other cooking techniques are welcomed for when your cookin' in the kitchen. Post your hints, tips, tricks & techniques, success, failures, but stay on topic and watch for that hijacking. |
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09-16-2018, 10:04 AM | #1 |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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Building a Traditional Offset
So I've acquired a 500 gal propane tank and have decided to build a traditional offset smoker inspired by the smokers of Franklin, Moberg, etc. But since I've never been up close and personal with any of their builds, I'm needing some guidance on the design. It seems I've seen somewhere on the interwebs a design guide that helps you size your firebox, stack, etc based off the size of your cook chamber. But I'm not having much luck locating it, if in fact I ever came across such a thing. Can any of you kind brethren lead me in the right direction? TIA!
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-16-2018, 10:21 AM | #2 |
somebody shut me the fark up.
Join Date: 11-29-12
Location: ABQ, NM
Name/Nickname : Marc
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Try the Feldon's BBQ Pit Builder Calculator.
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[B]Hardware[/B] - Weber 22.5 Kettle (Sep '16), OK Joe Longhorn (Mar '17), UUNI 3 Pizza Oven (Jan '18 ), Blue Rhino Razor Griddle (May '19), Cajun Bandit 22.5 Roti (Aug '20), Weber 26.75 Kettle (Dec '20) |
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09-24-2018, 10:23 AM | #3 |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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250 gal propane tank picked up today. Plan is to cut it in half for the firebox.
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-24-2018, 12:29 PM | #4 |
is One Chatty Farker
Join Date: 07-19-13
Location: Houston, TX
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Have you seen Franklins pit build video? That should help you with a lot of it. Also keep in mind Feldons calculator is just a guide not an exact science. According to the calculator the fire box should be 1/3 the size of the cook chamber. So according to the calaculator, Aaron Franklin is doing it all wrong.
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09-24-2018, 12:42 PM | #5 |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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I have seen it and I also picked up his book where he gives a guideline on how to build a homemade pit. Not a blueprint, but general ideas to follow on what he thinks is important in a DIY pit build.
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-24-2018, 12:45 PM | #6 |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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Scrap piece of pipe, 6.25" ID, 1/8" thick and plenty long for the stack. I had in mind an 8" diameter pipe for this but this might work...and is free. Any thoughts?
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-24-2018, 12:49 PM | #7 |
Babbling Farker
Join Date: 01-01-11
Location: Southern NJ...exit 36
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We had a Franklin inspired smoker build this past spring. Tank is 1000 gallon and firebox is half a 250 gallon. This think works unbelievably well. I took a chance and emailed Aaron and Stacy. The were kind enough to reply with answers to my questions.
I'm no pro at building these....we had someone do it for us. He's a killer welder so if you have specific questions please feel free to PM me....
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Proud owner of 4 VERY ugly drum smokers....and a Greasy Hill reverse flow.... Last edited by daninnewjersey; 02-25-2021 at 02:56 PM.. |
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09-24-2018, 12:57 PM | #8 |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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Thanks Dan! I'm not a welder either but we're in the construction business and have one or two on the payroll. This is going to be a rainy day project so will probably take a good bit of time to complete. I'm just in the rounding up materials phase right now. Do you have thoughts on the pipe I posted as the potential stack? Looking at yours, it appears to be at least a 10" pipe on your 1000 gal....is that correct?
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-24-2018, 01:07 PM | #9 | |
Babbling Farker
Join Date: 01-01-11
Location: Southern NJ...exit 36
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Quote:
We have a 10" stack yes. It's heavy beyond belief. Aaron suggested 12' tall but I went with 8' since driving the 12' around might catch on any number of things. I thought I'll just add 4' of stovepipe if needed. We don't need it.
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Proud owner of 4 VERY ugly drum smokers....and a Greasy Hill reverse flow.... |
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09-24-2018, 02:07 PM | #10 | |
is One Chatty Farker
Join Date: 07-19-13
Location: Houston, TX
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Quote:
When I stood on the trailer rails of Dylan Taylor's Austin Smoke Works 500, I would just barely touch over the top of the stack. That would put the height of that stack of around 8 feet somewhere. I don't know the diameter of it. I'd say 8"-10" though. |
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09-24-2018, 02:24 PM | #11 | |
On the road to being a farker
Join Date: 05-19-13
Location: NE TX
Name/Nickname : Rick
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Quote:
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The General has ARRIVED!: MAK 2* Hunsaker Drum: RED of course! 22" Weber Kettle For Sale: J.R. Enterprises Charcoal Grill |
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09-24-2018, 04:15 PM | #12 |
On the road to being a farker
Join Date: 06-30-18
Location: Silver City, NM
Name/Nickname : Allen
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SMOKERBUILDER.COM is were I got my plans. Very detailed and helpful.
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Allen 375 Gallon RF with warming cabinet 36" x 60" in ground pit 30 gallon vertical propane smoke with Big Daddy smoke generator Sausage smoking cabinet as well |
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09-24-2018, 05:19 PM | #13 | |
Full Fledged Farker
Join Date: 03-15-17
Location: Conroe, TX
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Quote:
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500 gallon Moberg offset, Old Country Gravity Feed, PK Grill. |
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09-24-2018, 09:18 PM | #14 |
is Blowin Smoke!
Join Date: 04-25-16
Location: Rochester/Finger Lakes NY
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Feldon’s calculator is a bunch of complete bunk BS. The inputs are the wrong variables and the formulas are absurd. The output will result in a smoker that works within a reasonable size range, but it is in no way optimized or in anyway superior to other designs.
The good news is these things don’t require any precision in design. Make your firebox big enough to work in. For me that means about a 2’x2’x2’ cube as a minimum. Another 6” or more in one of more dimensions may be nice to have, but BTU wise, a firebox with half the volume will still hold a fire that will put out more than enough heat for even a very large smoker. For exhaust, you want somewhere around 5-6’ of vertical difference between your air intake and the top of the stack to have enough draft for most normal conditions. An extra foot or three won’t hurt you, but too tall will make it harder to store and trailer. For a cooker up to about 300 gallons, a 6” diameter will more than get the job done, for a 500 gallon size I would go with an 8” pipe. The cool air coming in is more dense than the hot air leaving so the intake area can be a bit smaller than the exhaust area (about 50 sq in for an 8” circle) but for easy math I would shoot for 75-100% (38-50 sq in) give or take. The hottest least dense air is leaving the firebox going into the smoke chamber, so make that opening 50” or a little bit bigger. That’s about it. Follow those guidelines and your smoker will have plenty of airflow to cook hot and fast and way more than enough for low and slow or mid temp smoking.
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[Smoker: Lang 84] [Grills: Chargril on Lang & Webber Ranch] [Kamado: Pit Boss 24] |
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09-24-2018, 09:49 PM | #15 |
Babbling Farker
Join Date: 06-24-17
Location: Monroe, GA
Name/Nickname : Viet King Cong
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How is that smoker passing the 40/60 weight test for a trailer? I am assuming the firebox is insulated...
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