Interior Construction Helm Area (1)
In this post restoration photo you can see the reinforcments. The outer skin is darker than the reinforcing inner skin of the floor. The stringers rest on ply of the same thickness as the doubled skin, so the strip wood is of consistent cross section across the join. You can also see the intricate shaping of the frame at the transom, especially if you click the photo to view an enlarged version. The black "gunge" about the transom drain funnels is waterproof sealing - they are elegant and cheap, but not especially good at stopping water ingress!
With the toestraps bundled out of the way the the wooden fairleads in the stringers that hold the shockcord for the transom flaps are visible. Its also possible to make out the capping wood on top of the stringers that I presume is to protect softer and lighter timber underneath from damage. At the aft end of the main doubled floor the hog is squared off where a glass reinforcing strip runs across the hog and onto the ply each side. Where the turning block for the spinnaker halyard runs through the hog there is ply reinforcement each side, which is just visible as a darker area There is another similar reinforcement nearer the central beam.
A close up of the wood hook to retain the transom "flap" shock cord. One of the glass reinforcement patches can just about be seen to the left. Its clearer on the enlargement, where I've partially outlined it. Note how the hog has been squared off in line of the reinforcement. This happens on both hog and stringers wherever the glass reinforcement runs over them.