Web frame ship construction7/13/2023 ![]() Strakes of bottom plating to the bilges have their greatest thickness over the 40% of the ship’s length amidships, where the bending stresses are highest. Its thickness is never less than that of the adjoining bottom plating. Throughout the length of the ship the width and thickness of the keel plate remain constant where a flat plate keel is fitted. Stiffening members both longitudinal and transverse are generally welded to the shell. The vertical welded joints are referred to as ‘butts’ and the horizontal welded joints as ‘seams’. The bottom and side shell plating consists of a series of flat and curved steel plates butt welded together. ![]() Internal strengthening of the shell plating may be both transverse and longitudinal. ![]() ![]() The shell plating forms the watertight skin of the ship and at the same time, contributes to the longitudinal strength and resists vertical shear forces.
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