Butt Joint Question

[Matt@RFR]

Got it. Yeah, I'd definetely tie up that lap weld. You don't have to weld it solid, but putting, say, a 1/2" weld on both ends would be a good idea.

DONT LAUGH! I lost my body hammer when we moved

What's a body hammer?

Concerning putting that 4" hole through double wall, a hole saw will do it, as well as a jigsaw, and plasma's cutt double wall reasonably well.



If you do it with a jigsaw or equivalent, drill a bunch of holes tangent to your cut line, and then saw inbetween each hole. Lots faster that way.