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Originally Posted by silver suz
Andy, I'm the hub. Since we haven't yet figured out how to append a photo to one of these missives, I'll describe the problem. The lower flange of the main fore-aft "C" channel on both sides is rusty and wrinkled. This is right where the jack point is aft of the axle reinforcement plate. Top flange in tension, bottom flange in compression and wrinkled. Everything seems to sag down aft of the wheelwells and the extrusion which clasps the floor aft of the wheelwell on the driver's side is split lengthwise. I'm tempted to cut away the lower flange and up the web a couple inches on both sides, lift up the rear end until the frame is level, and weld in a piece of 2" angle to replace the flange and maybe box in the whole section to make it much stronger.
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This is kinda scary......I think I understand this engineer talk! It sounds like you are on the right track, but I wouldn't be too eager to do with as little as possible of the 2" angle iron. You might want to put a 'fishplate' on the side of the frame also, on the vertical part.
As I have never gone in there, I am not sure what thickness the frame is to start with. I have welded lots over the years, and I would use stainless steel much as possible......but I am from western NY, where they dump salt on the roads like it is free....at least in the winter.
I do want to tear into my TradeWind, but I would like some input before I start. most of the bottom skin needs replacing anyways, and the big angle iron square under there is pretty rotted away. I want to replace it with stainless steel.
Sid, from near Niagara Falls