We used one inch red oak we had left over, hinged them at the bottom and just fold them down. One hinge is mounted slightly higher than the other so they will overlap when folded. We drilled a hole in the side of the hatch and used lynch pins at the top so when they are up they are secure. They are very solid. We do not plan on skinning the inside of the hatch, so it works great for us.
Hinge in the down position.
Hinge in the up position.
Top with lynch pin installed.
Close up of lynch pin.
Supports folded down.
And in the up position.
We had bought some of the nice mechanical supports, but liked the look of the wood supports better, and they are more solid.
Hope this helps!

sid n side