chrisys
MemberGot rid of the matchlight.
Hey there everyone, firstly, I’ve found this site to be a great resource when researching and designing my first offset build so thanks! I’ve finally managed to put together a design that I think will work OK and wanted to share here and make sure I’ve not done something stupid.
I found it really tough to get hold of steel tube of large diameters here in the UK, so I figured I could weld together an octagon shaped tank. I’ve aimed for 20” wide by 40” long which gives me a volume of about 54.8 gallons; 12,658 cu in.
Using the BBQ Pit Calculator I’ve come up with a firebox size of 18” high, 17.25” wide and 18” long, which gives me a size of 5589 cu in, with a recommended size of 4220 so that’s a bit oversized at ~130%. I’ve purposefully made the firebox width a little less than the cook chamber, so I can add insulation later if I need to.
I’ve gone for a 4” chimney, 22 inch long with a collector the full width of the cook chamber positioned in the centre of the chamber height-wise, with the grate level centred as well.
The throat comes out at 46 sq inch and I’ve got 5 openings in the firebox door each 3.4x1inch, for a total of 17 sq inch.
Everything will be made from 6mm steel plate (~1/4”).
There are a couple of images of my design attached; I didn't bother drawing any legs or wheels yet as I thought it important to get the chambers right first.
From what I can tell this all checks out but I’ve never seen or used a cooker like this in person as they’re not too common around here. I’m intending to just burn oak logs. I am embarking on this mission as I’ve done a few cooks on my gas grill with pellet tube smokers and wanted to take it to the next level
If anyone wants to take a look at what I’ve done and throw in 2c before I start cutting and welding I’d appreciate the input!
I found it really tough to get hold of steel tube of large diameters here in the UK, so I figured I could weld together an octagon shaped tank. I’ve aimed for 20” wide by 40” long which gives me a volume of about 54.8 gallons; 12,658 cu in.
Using the BBQ Pit Calculator I’ve come up with a firebox size of 18” high, 17.25” wide and 18” long, which gives me a size of 5589 cu in, with a recommended size of 4220 so that’s a bit oversized at ~130%. I’ve purposefully made the firebox width a little less than the cook chamber, so I can add insulation later if I need to.
I’ve gone for a 4” chimney, 22 inch long with a collector the full width of the cook chamber positioned in the centre of the chamber height-wise, with the grate level centred as well.
The throat comes out at 46 sq inch and I’ve got 5 openings in the firebox door each 3.4x1inch, for a total of 17 sq inch.
Everything will be made from 6mm steel plate (~1/4”).
There are a couple of images of my design attached; I didn't bother drawing any legs or wheels yet as I thought it important to get the chambers right first.
From what I can tell this all checks out but I’ve never seen or used a cooker like this in person as they’re not too common around here. I’m intending to just burn oak logs. I am embarking on this mission as I’ve done a few cooks on my gas grill with pellet tube smokers and wanted to take it to the next level
If anyone wants to take a look at what I’ve done and throw in 2c before I start cutting and welding I’d appreciate the input!
