Hi Pete,

I think that there are two different things here.

One is the basic strength of the component - in this case the grain orientation in the wood. The second is wood/fiberglass composite construction of a kayak hull where there is more than one factor to consider.

In simple form [like a bow limb] the material IS the structure and the only strength is that of the material. Strength can be tested with relatively simple approaches.

In a composite construction, the strength is derived from the materials AND the form. Both have to be considered together, testing is more complex. For example, a plain sheet of paper will not support its own weight when flat - fold it, open the sheet to form a 90 degree angle and the sheet of paper can easily support its own weight.

This is where I was comming from with my post. I just kinda junped in with my comments - if I missed the jist of your question - sorry for the confusion.

Hank