The present invention relates to a bed having a rigid deck supported over the base. Four sections can be provided, with three of the sections comprising rigid grids that lie in respective planes. The sections can be coplanar when the deck is in a flat position. Several cross members can be provided to support the deck sections. Holders, which can be comprised of slots that are formed in the cross members, provide bidirectional support to side rails. In this regard, the bed rails can be removably positioned within the slots to maintain the position of the bed rails and eliminate rail migration.