On my fiberglass 20 footer the stringers on the sides are 1x8s that the deck actually rests on. In the middle there are two 2x4s that run back until the fuel tank and stop in the middle of the boat.At that point there are little 1" tall boards that are glassed in under the fuel tank. After the 2x4s stop at the front of the tank there is only one stringer on the keel which is a 2x4 glassed in but laying flat not standing up. The 2x4s ahead of the tank are standing up and run up to the tip of the bow and curve in to meet each other. I dont know how they bent the 2x4s up in the shape of the hull but I will probably go back with plywood instead.
My question is should all stringers contact the bottom of the deck?
My question is should all stringers contact the bottom of the deck?