An investigation is made of the buckling of the compression cover of post-stiffened box beams subjected to end moments. Charts are pre¬sented for the determination of the minimum post axial stiffnesses and the corresponding compressive buckling loads required for the compres¬sion. Cover to buckle with nodes through the posts. Application of the charts to design and analysis and the limitations of their use are discussed.nIf the flexural stiffness of the tension cover is equal to or less than that of the compression cover, buckle patterns with longitudinal nodes through the posts are not obtainable, no matter how stiff the posts are made or how closely they are spaced.
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