The ability of a hull structure to resist lateral forces. The main components and structures that bear the transverse strength of the hull are beams, ribs, ribs and the frame of the ribs and the transverse bulkhead. The deck, bottom and side structures of the ship will recessed and deform in the transverse section of the ship when the outboard pressure of the ship is not balanced with the pressure of the cargo and machinery in the ship. In addition, when the ship is subjected to the action of transverse waves on the water, the water pressure on one side of the ship will be greater than that on the other side, or the ship will roll due to the action of inertial force, often make the rib frame skew. However, the transverse strength of the hull of a general sea-going ship is sufficient and does not require detailed calculations such as the total longitudinal bending strength.