On Fri, 08 Aug 2008 21:46:10 -0500, "Martin H. Eastburn"
wrote:

Pipe cutter - Chain wraparound and a long bar on the pipe cutter.
Martin

Yeah, that chain pipe cutter will pop the post off the top rail real
fast and leave a nice square clean cut - but that still leaves the
"fishmouth" of the vertical post welded to the top rail pipe.

He's trying to cut that fishmouth and weld off, and either a plasma
cutter or oxy-acetylene cutting torch is the tool for the job. The
choice depends on what you have available or the budget for.

Angle grinder for cleanup, and a stick, wirefeed or MIG welding
torch to fill in the inevitable divots. Then hit it again with the
grinder.

-- Bruce --