A load carrier has a flat tray-like body that attaches to a vehicle by load bars. Multiple components may be installed on the tray body in many locations on the tray body, for containing and/or supporting cargo. One component is a cargo container that is captured and locked in one of several possible positions on the tray body. Other components are cargo posts that include one or more upending towers for supporting cargo by capturing generally vertical portions of the cargo between the towers, wherein the cargo posts may be non-pivotal, pivotal, slidable and/or adjustable. Another component is a hooked or curved depending assembly that suspends cargo from the edges of the tray body.