The No - weld Double Barrel Smoker http://www.instructables.com/id/The-No-Weld-Double-Barrel-Smoker-and-how-to-use-i/
The No-Weld Double-Barrel Smoker (and How to Use It): 20 Steps (with Pictures)
BIG SMOKEY triple barrel smoker
Put That in Your Barrel and Smoke It! How to Build Your Own Ugly Drum Smoker #infographic #DIY #HowTo
Vertical Barrel Smoker ...
110 Double Barrel Smoker Grill
How to setup and modify offset smokers such as the Brinkmann Pitmaster, Brinkmann Smoke'N Pit Professional (a.k.a. SNPP), Char-Broil Silver Smoker, Char-Broil American Gourmet, Bar-B-Chef, and the Char-Griller Smokin Pro.
Your guide to buying, using, and maintaining offset barrel smokers—a.k.a. horizontal smokers, pipe smokers, or “stick-burners”—from a meat smoking expert.
Seen this design before, there is even a triple stack that looks like you could have a lot of fun with.
The No-Weld Double-Barrel Smoker - Survival at Home