Soggy Floor - help needed

[aldo]

Pulled the floor section on my 23' Inboard. It is approximately 5' x 6' and spans over the two gas tanks. The outer skin is fine so I am just redoing the bottom.
I can probably match the way this was done- 3/4"plywood ribs and plywood squares.
My question is- Is there a better way to construct this with contemporary products? Am I better off making the ribs out of hard wood? Should I use divinycell?
What product should I use to attach the plywood or divinycell?
When all is said and done it has to span the 5 foot to the other side without touching the tanks.
I'm sure some of you guys have done this and I appreciate your input- trying to post images....don't know what I'm doing wrong.
[image]http://i749.photobucket.com/albums/xx135/Fred246/Floor2.jpg?t=1267483938[/image]

[image]http://i749.photobucket.com/albums/xx135/Fred246/Floor1.jpg?t=1267484982[/image]

[image]http://i749.photobucket.com/albums/xx135/Fred246/Floor1.jpg?t=1267484982[/image]