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This page talks about the use of two aluminum plates to sister a delaminated main beam in the older Alberg 30's. There are other techniques that have been used to fix this problem. This technique was developed by Bruce Rankin and had proved to be simple and durable See the collaboration section and mailing list archives for other perspectives. The plates should be 3/8" thick 6061 grade aluminum, cut to fit the curve of the beam. Rather than starting with drawing your own templates for the aluminum, you can contact one of these companies which have already digitized the shape. These companies use a water-jet cutting process that results in a very clean cut. In the USA:
In Canada:
Please support these businesses that support the Alberg 30 Association: 
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