ROLLED FORMED
lONGITUDINALS
The Bezier 12.5 uses a longitudinal framing system. This mean that the shell plating is supported and welded to the longitudinal frames, not the transverse frames. The big advantage of Roll Forming over Saw cutting is the material savings. Roll Forming uses flat bar. There is no material waste produced as with saw cut longitudinal frames.
This "Rolled Forming" method will be used for all the longitudinal frames between the sheer and the Center Vertical Keel. Each longitudinal frame is developed to its true length and form. This true curve preforms the curve, the hard way, in one direction of its roll. The other direction of roll, the easy way, effortlessly take on the the required curvature. 
Two sets of full size longitudinal frame patterns are supplied with the Bezier 12.5. One of the sets, the forward set, is show set up on a work table. You will see seven (7) single lines, which represent three (3) longintudinals below the chine and three (3) above the chine. The chine line (transition point from Bezier curve surface to developable bottom surface) is the seventh longintudinal. The forward and aft sections will be joined on installation into the transverse frames.
CROSSING LOCATIONS The patterns for Rolled formed frames and Saw cut frames alike contain locations of the crossing between the transverse frames and the longintudinal frames. This proves invaluable in the assembly of the framing system. Nothing is left to chance.
Below are all the longintudinal frames, for one side, overlayed onto the full size patterns 
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About the 12.5 Design
