Abstract: Disclosed is a structural member for use as a vertical supporting post in a merchandise display rack. This member is made of two identical, longitudinally extending end plates that are W-shaped in cross-section and oriented in such a manner as to face each other, and of two identical, longitudinally extending side plates that are welded to the end plates to join the same and form the member. The end faces of the end plates are provided with three parallel rows of longitudinal slots for use to hook a footing at the bottom of the post, or one or more shelves along the same. With very slight changes only, the side plates may also be used as tie-bars for interconnecting the posts of the rack.