Quote Originally Posted by Tom J View Post
My first bed was ok till I weld those flat bars 8mm thick - it warp badly in the middle
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Looking goid mate! Tack welds are the way to go. And lots of clamping. I would have got a piece of say 35x70mm box tube and clamped it in several places to the flat bar piece you were working on. Then going from the outsides in to the middle as your box frame will also slightly warp from the welds. Tack everything first then repeat the clamping process all over again with your filler welds.

It's hard with long runs like that. Partly the reason bojan S uses C channel for his bed. Although I find welding much easier, drilling and bolting would have given a better result.

Whats the link for your thread?

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