This construction method makes boat kits accurate and easy-to-build
The Tab-n'-Lock system is used on several of our skiffs that do not require a strongback/building jig for construction making the boat very quick, easy, and accurate to build. Tab-n'-lock uniquely uses mortise-tenon-type joinery between the bulkheads or frames of the skiff interior and the side panels of the boat. The tabs on the bulkheads and frames engage slots that are pre-cut into the side panels. My system is only possible with 3D computer modeling and precision CNC cutting, some of the traits that make Chase Small Craft kits unique. To hold the bulkheads and frames tight to the hull sides, small shop-cut wedges are used. After the gluing of the hull is complete, the tabs are cut flush with the sides of the hull, sealed, and painted over. They are not visible from the inside of the hull, which can be varnished.
Tab-n'-lock is also used as a way to join bulkheads and strongback parts on larger boats requiring a building jig. This "3D puzzle" allows the interior structure to be locked together in the building jig, a major convenience, and creates a rigid interlocking structure over which the hull is planked. These tabs and slots are a big part of what makes what used to be an advanced build something a beginning boatbuilder can tackle.