ESDU Struct 02.01.11 provides graphs relating the average stresses to the stresses in the unloaded edges of a slightly curved plate loaded along its axis with the other edges clamped but subjected to negligible lateral restraint. The plate is assumed long enough for the effect of the edge conditions at the loaded edges to be negligible. Four graphs are given, each applying to a different value of non-dimensional initial irregularity, defined by the ratio to the plate thickness of the maximum inward deviation of the surface from a straight edge placed anywhere on the outside of the plate in an axial plane. For a zero radius of curvature the curves agree with theoretical results for flat plates, and for the greatest radius of curvature considered they also fit theoretical results closely in the range of practical interest. Curves for radii in between were interpolated. For small radii the slope of the curve of average stress against edge stress is underestimated after buckling and no account is taken of the effect of yielding at or soon after buckling on the average stress.