Will This Core Self Destruct??

[theothersully]

Hello,

This is my first post on this forum.

I am in need of some help deciding if I can use some materials we have lying around for a core.

The panel in question will be used as the bridgedeck of a 50' catamaran we are building. This is the deck that spans the two hulls. The deck takes some load, but it is mostly walking around on it loads and/or tension. The big loads are handled by dedicated composite cross beams.

My question is about the core of the panel.

I have enough 1.22" Core Cell A700 (7lb) foam around to do the job, but it's a little thinner than spec calls for. So, I'd like to add a little more foam and connect it via a syntactic layer of epoxy and microballoons. The extra foam I'd like to add to the core is 1/2" H100 Divinycell with a density of 7lbs/cuft.

The question is: Can I do this??

Will the panel self destruct after a million cycles at sea, or is it viable?

Here is a diagram I made up to make the question more clear:

 

[theothersully]

EDIT: Please note that the 1/2" Divinycell is 6lb foam, not 7lb foam. I made a typo in the original post.