Forum Discussion
69_Avion
Jan 02, 2015Explorer
brholt wrote:
Not to cause trouble :B but some people aren't very happy with boxed frames:
Boxed frame rust
There was another online picture of a Chevy frame breaking in two when it was lifted onto a hoist. There is no doubt that the boxed frame can, and will, rust from the inside. The inside doesn't get coated with rust protection and that really creates a place where rust will thrive. There is no doubt that a boxed frame has more resistance to twisting, but that only becomes a real issue if you plan on subjecting your frame to some serious angles with a heavy load on it. If you are doing that, you need to be concerned with over stressing the axles. The frames are made to twist. I have built many trailers with both structural channel and rectangular tubing. I prefer the structural channel, not because of the twisting but because they are easier to completely coat with paint and they are more forgiving when welding on them. The rectangular tubing can warp easier when you weld on them, but they are easier to fit the pieces since most cuts are square, whereas channel needs to be tapered to fit the crossmembers which is a lot more work.
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