A directional flow raised floor air-grate is provided for the enhanced thermal management of a raised floor computer room. The air-grate includes a load bearing frame. The frame has four vertical girders connected, in a ninety-degree alignment, so that four corners of the frame are capable of supporting the air-grate as an air handling separation barrier on a raised floor pedestal support system. A plurality of vertical reinforcing beam members is connected to the frame so that the reinforcing beams are aligned in a longitudinal spaced relationship. At least two vertical airfoil vane members have an upper inclined and, lower vertical planar surfaces. These surfaces are demarcated by a longitudinal axis of the vane members. The vane members are connected to the frame in a crosswise spaced relationship to the reinforcing beam members, so that a plurality of openings are created between the reinforcing beams and the airfoil vanes. The upper inclined planar surface of the airfoil directs cooling air from a lower plenum of a raised floor through the openings on an inclined plane towards the cold air intake surfaces of a data server cabinet to be cooled.