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Several aspects of the design and behavior of ship stiffened plates are discussed in this bulletin.The stiffened plate which is represented by an equivalent orthotropic plate, is subjected to compressive in-plane edge loads in two perpendicular directions, in-plane edge shear and lateral load. The basic differential equations describing the behavior of the plate in the prebuckling as well as in the postbuckling regions are presented, and a computerized solution is given. Non-dimensional design charts are presented giving the center deflection, critical load, effective width and bending moment in the stiffened plating. The charts are generated to cover a wide variety of values of the biaxial in-plane compressive loads, the in-plane shear, the lateral load, the virtual aspect ratio and the stiffeners and plate geometric characteristics. A computer program is also listed which can be used to determine additional results for values of parameters not covered in the design charts. Interpolation of the results presented in the design charts is also possible. Examples of applications illustrating the use of the charts are given, and description of the input/output operation of the computer program is included.