High tech propane fired 6 rack refrigerator type ovens may be things of beauty, but just like the classic Brinkmann offset barrels, the opportunity to build a BBQ smoker is a whole other trip. The typical smoker comprises two parts. The fire box is a closed box for holding wood or coal, where it undergoes oxygen deprived burning to generate smoke rather than fire. It is connected to the smoking chamber, a bigger closed box for holding meat, where the smoke goes and forms a cloud and is swiftly vented out. The smoke cloud slow-cooks the barbecue using indirect heat.
A basic design when you build a BBQ smoker is the smoke box, in which the fire box is adjacent to or underneath the cooking box. What is common, however, is the offset barrel smoker. Its cylindrical smoking chamber is connected by a pipe at one end to its cylindrical or sometimes square fire box, and has a chimney at the other end. The chamber contains a grill rack for the meat.
The upright drum smoker, or UDS, has a steel drum containing numerous grillware. The bottom grill rack is for the wood or coal, followed at a distance by two or more racks for the barbeque. Sometimes there is a water pan between the fire and meat racks, which then makes this design a water smoker.
The best barbecue smokers have tightly controlled heat flow in the fire box. In the same vein, it would not be uncommon to use a hot plate or heating coil when you build a BBQ smoker.
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