I now finished construction of the centerline structure. this had to be done carefully as the accuracy of the hull construction will depend upon this. i have attached all mating components to the. Here is a way to tackle the formidable task of building wooden boats, in 7 simple steps. step 1. build the ribs using the 2 by 4 wood. this will mean that you need to cut the gussets to reinforce the rib joints from 1/4-inch marine plywood. similar to the ribs on the human body, the ribs secure the rest of the boat’s composition.. Steps. part 1. building the frame. 1 you can find wood flour at any boat building supplier. this mixture is known as a fillet. mix the wood flour and epoxy to a smooth creamy mixture -- it shouldn't be runny. apply this fillet to the joints that you put the epoxy on. "at first i had no idea how to build a boat, but when i.