On 2013-10-19, Ignoramus23452 wrote:
I have a 3/4" thick steel plate that is 3/4" thick. It is bowed in the
middle along its length. The worst un-straightness is in the middle
and it is appx. 1/4". I would like to straighten it. How can I
realistically do it, if at all.

A followup: We straightened it with a hydraulic jack and chain. Welded
three 6x3 steel channels underneath to keep it straight, using jack as
each support was welded. Right now, the worst un-straightness across
the whole table, is no more than thickness of one credit card.

http://igor.chudov.com/tmp/table.jpg

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