Don Stephan
Posts: 825
Joined: 2003-07-18
Location: Cincinnati, Ohio
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Often I've read that pressure spreads out from a clamp pad 45 degrees in all directions. Thus clamping pressure spreads much more when clamping a 3" thick board than when clamping a 1" thick piece.
With boards 12" wide it's going to be difficult to apply anything near uniform clamping pressure when the pieces are only 1" thick. Clamping cauls across the width will help apply pressure across the width, but not along the length. And lots of discrete clamps would allow a twist to be incorporated in the assembly.
It would add cost, but the best solution would be to flatten and straighten a 10/4 board, edge gluing two or three pieces to get the needed width if necessary. The next best solution likely would be a vacuum press using an adhesive with sufficient open time. My two cents.
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