Bi-axial vs Woven rowing

[TomE]

Is there a simple rule of thumb for how biaxial e-glass compares to woven rowing/Cloth of similar weight?

I'm thinking of using a single layer of 9 oz biaxial instead of two layers of 4 oz cloth each side of a stripper canoe (epoxy).
How would these compare weight and strenght wise? There is 12,5% extra fibers in the biaxial I found avaiable - to simplify things, let's say it's 8 oz.

Both materials has 90 deg angle between fiber orientations (0/90 and +/- 45) and equal amonts of fibre, and should be easily comparable.

Am I right in thinking that strenght will be unchanged, stiffness increased, elongation reduced and fiber/resin ratio improved? Any rule of thumb to how much this will amount to in percent? Literature/formulas?

[yokebutt]

Tom,

Short answer to your questions: Yes. However, cloth might behave better going around the compound curvature of a canoe.

Yoke.

[Raggi_Thor]

We are going to test this, but I imagine that the woven fibres have to straighten out before they absorb any significant stress. So a sandwich with biaxial will be stiffer than one with woven roving/cloth.