Since the problem of determining bending stresses due to torion in a box beam is closely related to the problem of finding end loments in a continuous beam, it is possible to determine torsionending stresses by a procedure similar to the Cross method of loment distribution widely used in the analysis of continuous :ames. The method, as applied to the simplest case—the prismatic ox of rectangular section—is described in this paper. Cases inolving flexible bulkheads and complete cutouts of one or both urfaces are considered. Expressions for constants analogous to he fixed end moments, stiffness, carry-over, and rigidity factors f moment distribution are presented, and application of the lethod is illustrated with numerical examples.