Boat hull construction

A boat hull including a stringer member having an end surface, a bulkhead member extending transversely to said stringer member, fixed thereto, and including an end surface in coplanar relation to said end surface of said stringer member, a projection extending beyond one of said end surfaces, and a deck member engaging said end surfaces of said stringer member and said bulkhead member and including a cut-out receiving said projection.

A boat hull including a stringer member having an end surface including therein a cut-out, and a projection extending beyond said end surface, a bulkhead member extending transversely to said stringer member, fixed thereto, and including an end surface extending in coplanar relation to said end surface of said stringer member and including therein a cut-out, and a projection extending beyond said end surface of said bulkhead member, a deck member engaging said end surfaces of said stringer member and said bulkhead member and including cut-outs respectively receiving said projections extending from said stringer and bulkhead members, and a gusset member extending substantially at a right angle to said stringer and bulkhead members and including a first projection received in said cut-out in said stringer member and a second projection received in said cut-out in said bulkhead member.

A method of forming a slot in the periphery of a planar frame member for a boat hull, said method comprising the steps of initiating rotation of a cutting tool, locating the rotating tool in extending relation above and below the frame member, moving the rotating tool in the plane of the frame member and at about a right angle to the periphery for a distance equal to about the depth of the slot plus the diameter of the tool, thereafter moving the rotating tool in the plane of the frame member and in the opposite direction for a distance equal to about the diameter of the tool, thereafter moving the rotating tool in the plane of the frame member and parallel to the periphery for a distance equal to about the length of the slot, less the diameter of the tool, thereafter moving the rotating tool in the plane of the frame member and perpendicularly to and away from the periphery for a distance equal to one half the diameter of the tool, and thereafter moving the rotating tool in the opposite direction toward the periphery at least until the tool diameter passes outwardly of the periphery.

A frame member for a boat hull, said frame member being formed of sheet material and having a perimeter, and a slot located in spaced relation inwardly from said perimeter and including two parallel side edge surfaces, and two semi-cylindrical surfaces.

A frame member for a boat hull, said frame member being formed of sheet material, having first and second spaced peripheral surfaces having respective first and second ends in adjacently spaced relation, and having a tang defined by first and second side surfaces respectively extending outwardly from said first and second peripheral surfaces, by an outer surface connecting said first and second side surfaces, by a first semi-cylindrical surface having one end tangent to said first side surface of said tang and a second end extending at about a right angle to said first end of said first peripheral surface, and by a second semi-cylindrical surface having one end tangent to said second side surface of said tang and a second end extending at about a right angle to said second end of said second peripheral surface.

A frame member for a boat hull, said frame member including first and second peripheral surfaces located in spaced relation to each other and having adjacent first and second ends spaced at a predetermined distance, a slot extending inwardly of said peripheral surfaces and defined by first and second side surfaces respectively extending at about a right angle from said first and second ends of said first and second peripheral surfaces and for a distance about equal to the depth of the slot, by a bottom surface extending generally parallel to said first and second peripheral surfaces and having first and second ends spaced at a distance less than the distance between said side surfaces, by a first semi-cylindrical surface having a first end extending tangently from said first side surface and a second end extending at about a right angle from said first end of said bottom surface, and by a second semi-cylindrical surface having a first end extending tangently from said second side surface and a second end extending at about a right angle from said second end of said bottom surface.