We still have to find more than a couple people to publicly assist Don in his endeavor, according to the technique he wants to use to build his ship, so for what it is worth:
To help you figure out and visualize the orientation of the frames…
Just think about it this way:
1) Your are standing inside the ship: say at the center, inside the framing at the point between the forward and aft frames.
2) The forward frames are marked “AV”: which stands for “avant” (in French.
3)The aft frames are marked as “AR”: which stands for “arrière” (in French).
4) You might have a frame marked differently between the 1st AV frame and 1st AR frame at the center of the ship. If you do, this frame may be marked as “couple de levee” or “MC” (maitre couple – in French) translated as Master frame or mid-ship frame in English. Anyway, say, that would be the spot you would standing at, inside the hull. From there you would be looking forward and see all the AV frames + the bow framing of the ship, turn around and see all the AR frames and stern framing.
To read the lines and figure out what they mean to help you visualize the orientation and the definition of the parts, and subsequently, the orientation of the frame as a whole, all you have to do is convert the individual frame plan into a drawing similar to the image (kind of a 3D rendering you like) included in the last reply from Gérard about frame 2.
Again, this may take some time, but as I said before, this can be done with a photocopy or reduced printed scan of each frame where you use the solid and doted line to separate each layer with coloured crayons or highlighters to define each of those layers. Once you have that done a few time, it will eventually become “second nature” and easy to determine without physically going through the process.