Boxing a frame, questions?

[ccm399]

Hey David,

Let me clarify the weight deal. It sounds like you will be doing this with completely taking the truck apart, right? Basically what I was trying to get at was everything that is mounted to the frame can and probably is causing it to flex. So if you could get he weight of the engine and driveline out of the truck the the frame should be closer to straight.

The weight might not be a huge deal but I would at the very minimum make 100% sure whatever you are using to elevate the truck is level at all four locations. A transit would be PERFECT for this. Well, technically it does not have to be a true transit just a level will do. Something like this job site level CLICK ME If your heights are off when you start then you will for sure be bracing a twist into the frame. I would even go one step further and find four locations on the frame I could check to make double sure I was not welding on a twisted frame.

As for the frame thickness I am with Cruiser, I would guess 1/8 max. If it is 1/4 I would probably still use 3/16 you will get most the strength and have less weight to haul around and be easier on your welder. +1 on the .030 wire, that's what I run in my Miller 175 (its about 8 years old) but it is a 220 machine only. The 211 auto set is a great machine CLICK ME to find the specs. Looks like on 120v it is good for 90 amps @ 20% duty (2 minutes on 8 minutes off). You should be OK but you will need to let her rest as you will be running it pretty much full out on 120 volts. I know when I was building my English Wheel my 175 would need a rest from time to time welding the 1/4 tubing for the frame. Worked out OK though since I was trying to prevent heat buildup anyway. Also, DO NOT use an extension cord!!!!! That will KILL the output of the machine not to mention blow the breakers in your house quicker.

As for the X Brace. Do it! As for size I would need to look at the space you have to work with and then make a choice. In my mind 2x2 1/4 wall would help but not as much as I would like. The span will be more of an issue that the gusseting. However, it will need gussets for sure. Again, guessing I would like to see something like 2x3 1/8 wall or something like that. just a guess but a start. As Cruiser said anything to try to keep the frame rails from moving separately as they are loaded is a good thing. The triangle is your friend with this need!