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Thread: roof rack
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13th November 2010, 12:57 AM #1New Member
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roof rack
Hi all
I'm new to this so pls bear with me.
Im wanting to weld a trades man roof rack to my 4x4. I was thinking of using 20x20x1.6mm tube. can any one help with welding. what is the best way to weld it with a arc welder. My welder can do 40amp-140amps.
and also what type a steel is best for powder coating.
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13th November 2010, 06:07 PM #2SENIOR MEMBER
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Wooddog, that tube seems a bit light to me - depends on your design, span and what sort of weight you're going to carry though. Also 1.6mm is pretty challenging with an arc welder if you're just starting out - so practice a bit first. I'd drop around to your local powder coater and ask what's required. They'll probably ask you to drill holes in any enclosed sections. Otherwise, if your welds aren't up to it, the closed section can pressurise when they cook it (cutting fluid, etc. in the sections) - then you either have a split seam or any crap in section gets baked into your powercoat. Also, the holes give them something to hang your job off too for drying and so they can get a good coating all round. I've had quite a few jobs done for mild steel, galvanised and aluminium - if the job is really rusty they'd want to sandbast it first, but otherwise I don't think the base metal matters that much. Cheers - Mick
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