The structural member is made from corrugated board or fiberboard and has a longitudinal axis. It comprises a housing having a top wall, a bottom wall and a pair of side walls. A pair of laterally spaced-apart internal dividers are located within the interior of the housing on opposite sides of the axis and extend from one end of the housing to the other end. A plurality of laterally extending reinforcing elements are located within the housing and are supported by the pair of internal dividers. The reinforcing elements have peripheral edges which contact the walls of the housing to provide support for the walls. The structural member is constructed and designed to withstand many pounds of applied force before failure.