Structural members being bent develop tension stresses in one face and compression in the other face (tension in the face becoming mone convex); the material in between developes shear stresses (sliding forces between the faces). The styrofoam would not be capable of developing the shear stresses. The result would be two epoxy/glass layers in stead of one structural sandwich with a major reduction in strength..

> I've got one stripper under my belt now and am thinking about the next.
> Question: would it be possible to use styrofoam strips instead of wood.
> Build the exact same way but using foam strips for lightness and cost
> savings. If sandwiched between glass, would it be strong enough to hold
> the riggors of boating. TIA Paul