Fixing a central crown in the subfloor
I just had the wildest thought, I really haven't thought this through at all but here goes. Could an engineered beam be placed under the joists with a 2X4 block or whatever at each end for a spacer. Cut a hole in the floor at the joists that are crowned upward, using a good cabinet clamp pull the joist down to remove the crown and secure the joists to the beam.
While thinking more about this, there would have to be blocks sized for each joist as all the pressure would be on the two end joists and could push an upward crown in them. If there was some way to secure the two end joists so they could handle the upward pressure and not move it might work.
Another thought, once the beam was set and secured onto the two end joists, measure each joist from the beam to the bottom of the floor (not the bottom of the joist) and make all the joists the same measurement from the beam. This would spread all the pressure out and maybe work that way. OK maybe I am all wet here and not thinking this through, anyone see a down side to this?
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