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  • JTMcC
    replied to Need Trailer Welding Advice
    When or if you go to buy material, remember there is no such thing as Sch 40 or Sch 60 HSS (structural tubing).
    It's called out by the outside dimension(s) and wall thickness such as 4X2X1/4. 4" X 2" , 1/4" wall thickness....
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  • JTMcC
    replied to Need Trailer Welding Advice
    Like I said, you don't have to believe it. The truth is out there. If you look....you'll find it.
    There are tubular structural pieces in place since before I was born with minimal to no internal corrosion. I've cut them open on seismic retrofits. I probably have pictures.

    Keep in...
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  • JTMcC
    replied to Need Trailer Welding Advice
    No the AISC (and several others) are right. This was studied to death many years ago when structural tubes started coming into use by people who really couldn't afford to have bridges coming apart.
    Once the small amount of oxygen present in a sealed tube is depleted, there is no further corrosion....
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  • JTMcC
    replied to Need Trailer Welding Advice
    That's incorrect. A sealed structural tube only has the moisture that's sealed inside, and that only supports corrosion for a very short time.

    These things were studied, and figured out well before I was born. And it can be a 1" square tube, or a 12" X 24". Sealed structural...
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JTMcC
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Joined: 02-09-2004
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