The frame in Section 7 of BTSHC has just two gussets, one on each joint. We recommend four gussets, two on each joint.

They also cut the chine log with a close fit. We cut a diagonal off the 70 degree corner, and the opening serves as limber holes. The strength is in the double gusset, and the adjacent plywood bottom and sides. There is no strength requirement between the frame and the chine log. Therefore this does not in fact weaken the boat.

Also, for boats without decks or air tanks, we cut a little shelf in the side frame, as shown. This makes the boats stackable.