A reference book to the simple scanting rule calculations for strong hulls and decks in all materials intended for boat builders and designers. Calculations of boat strength are crucial: errors can lead to flexing hulls, blown out windows, cracked engine mountings, corroded welding, snapped masts and keels falling off. The author has created a system of easy-to-use scanting rules and rule of thumb for calculating the necessary dimensions of boat hulls, decks and structural components, whether built of fibreglass, wood, wood/epoxy composite, steel or aluminium. In addition there are photographs of good and bad practice, example calculations worked through for boats from 3 to 37 metres and an in-depth, discussion of boatbuilding materials, methods and practices to guide the reader through all aspects of boat construction.".