Type of wood used for spine?

[billfish16]

I’m going to assume that I used the wrong term “spine/keel” in my original post to describe the area I’m replacing next. Follow the link for a short video of the area, the “spine”, that I’m replacing next. https://youtube.com/shorts/uz15niL94O4?feature=share.

[Giorgio]

Video is unavailable, well at least to me it is?

[phatdaddy]

I can t see it either,says private video

Anyway,given what I ve seen in my hull , probably resin soaked plywood squares

[Destroyer]

Are you sure that what you're calling a spine isn't a Stringer? Solid wood standing upright running the length of the boat?