Abstract: Thin-webbed profile members are intended for reacting primarily compressive load and have shape and cross-section dimensions constant along its length. The profile members have main strips and additional strips. The ratio of a width of an additional strip with common reinforcing ribs to a width of the main strip satisfies the expression: a/b=0.3 to 0.7 and the ratio of the thickness of the additional strip with common reinforcing ribs to the thickness of the main strip satisfying the expression: ?a/?b=1.0 to 3.0. In the expressions, a is the width of the additional strip with common reinforcing ribs, b is the width of the main strip, ?a is the thickness of the additional strip with common reinforcing ribs, and ?b is the thickness of the main strip.