The motor guy
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- Nov 29, 2009
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- 7,293
I was thinking about welding two square tubes lengthwise to stiffen it up.Anything you add to increase the amount of material will increase rigidity. the further that material is from the neutral axis the better. You could weld another C channel onto the open face of the existing c channel. you could also weld flat strap on the top and bottom of the channel, that would increase the strength but only in bending. any off axis loads would still cause it to flex. you could also put square tubing vertically stacked at 6in spacing inside the channel this will increase rigidity, but only marginally since most of the material is near the central axis.