Hull construction of a Spirit begins with laminating wooden ring frames with an extraordinary degree of accuracy over full size computer generated patterns. These are then positioned upside down onto a ‘strongback’ before the centreline structure is laminated as one continuous structure over the entire length of the hull. No moulds are used in the construction process of a Spirit.  The beamshelves are then fitted before the whole assembly is meticulously bevelled and faired to take the first fore and aft layer of hull planking. In the larger Spirits, the central frames are reinforced with laser-cut stainless steel inner frames to take the load of the mast, chain plates and high aspect lead keel below.