Hi Don, i prefer to butt-weld any sheet metal used on the outside of the car, as well as the floor pans, i just feel that the overlap of the flange just creates a place for rust to start, but its easier to clean up the welds -- and i think the factory used the flange welds on the floor pans- there is a way i have seen that i would like to try with a tool from HTP 12002 notcher, which creates a "V" and then you weld at the base of the "V" and creates less grinding, but would not look very nice on a panel you could see from both sides. and the tool is almost 100.00.
Harlan http://www.hkaa.webs.com In a message dated 9/29/2009 4:15:39 PM Central Daylight Time, [email protected] writes: > I'm looking to settle a dispute between two friends of mine... > > When replacing sheetmetal floor pans (or other panels) one friend says > it's best to butt-weld the panels together and grind each side clean. The > other says all edges should be flanged with a crimper and welded on one side, > seam sealed on the other side. Personally I have done both but never > bothered to clean up the welds. The second argues that the floor is not as > strong when butt-welded. > > What is your preferred method? > --Don > >

