Abstract: A pair of opposed parallel upright walls formed of upstanding studs support a pair of longitudinally standing parallel, horizontal opposed double plates, respectively. These double plates respectively support the outer end portions of a pair of converging upwardly and inwardly extending roof rafters, the ends of which abutt each other at the central portion of the building. A pair of truss struts criss-cross beneath the peak of the roof rafters, the outer ends of the truss struts resting on the plates and the inner ends of the truss struts being secured to intermediate portions of the opposite roof rafters. Bolts secure the end portions of the truss struts in place. A king post extends vertically upwardly from the junction or intersection of the truss struts and is connected to the junction of the roof rafters.

Abstract: A catamaran is disclosed having a frame supported by a plurality of hulls with each hull having a bow and a stern with maximum hull beam breadth located along a lateral plane intermediate the bow and stern. The distance between the bow and stern of each hull is between approximately 3 and 31/2 times the distance between the bow and lateral plane of maximum hull beam width. The distance between the bow and stern of each hull is also between approximately 51/2 and 6 times the maximum hull beam width. The surfaces of the hull bilges in lateral planes intermediate the bow and stern define circular arcs of diverse radii.