Reply To: Twisted stock for laminated workbench top
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Dear Tas,
Please forgive me if I’m breaking down already wide open doors. You mention that the upper surface of your top is flush, but is it also flat? If that’s the case, then it would be just the corner of the underside not being in contact with the trestle, which perhaps is just down to the trestle tops not being parallel. Anyway, even if one corner is thinner than the rest of the top (lower example of my attached poor drawing), it still might not require any re-dimensioning. As long as that thinner part does not encroach on the supporting undercarriage, why not attach your vice[s] along the opposite long edge. The thin part wouldn’t matter then, would it?
If there is a true twist (upper part of drawing), and the twisted area is acceptably small, then perhaps planing it down would turn the situation to the one above. If planing it down is not a feasible alternative, it might hopefully be possible to find the culprits among the boards that build up the laminate. With a bit of luck it could be just a few that are locally out of square.
A kitchen top I made did not come out flat. Flattening its whole area was quite the chore.