Ae you talking UDS (Ugly Drum Smoker) or DBS (Double Barrel Smoker)? A UDS is an upright barrel, like these I built...
Sounds like you are describing a DBS. If so, look at this link for how mine was done and a parts list. No welding required.
http://www.smoked-meat.com/forum/showthread.php?t=2255
Here's one a guy built off my post...
http://www.smoked-meat.com/forum/showthread.php?t=5328