This engineering work computes the wave-induced bending stresses upon the Ark, and then evaluates a series of internal trusses to carry the entire bending load. The joints, notably the metal dowels resisting lateral loads, govern the design. For a small-cubit Ark with trusses at a 45 degree web/chord angle, and 0.8 wood density (g/cm3), the required trusses consumed 12% of the volume of the Ark and 20% of its displacement, and required 25,000 board feet of structural wood. The large-cubit Ark is more efficient than the small-cubit one in terms of percentages taken by interior trusses, but requires much larger timbers for the construction of these trusses.


Timber Engineering, Hull, Shear Lag, Beam Theory, Wooden Structures, Design


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