By now every boat builder knows that fiber orientation is critical to laminate strength. And I’m sure everybody knows that 34 oz triaxial for example has a bending strength of some 65,000 psi in the 0 degree, and about 20,000 psi in the 90 degree orientation, hand layup. And unidirectional fabric will have some 100,000 psi bending in the 0 degree and maybe 3,000 psi in the 90 degree.
But that is not all there is to it. There has to be off axis fiber even if it performs less well. I first learned about that in Tsai’s composites class in ’90 I think it was. In tension it would not matter, but in compression and bending, the hard-working 0 degree fibers have to be kept in column, as it were. The trick is to have no more than 3 zero degree layers stacked before adding an off axis one. Then you can add three more.
I have visited mulithull build sites where I have seen plans from famous designers with like, 10 or 20 layers of 0 degree stacked up, and no off axis fibers. Don’t they know? And they charge many times what I do.