可以放置托盘的水平组件。在固定机架系统中，机架底座牢固地用螺栓固定或焊接到机架柱上。在活动式货架系统中，水平货架组件悬挂在立柱中，并通过锁定销固定以防止抬起。

        Horizontal component on which the pallet can be placed. In fixed racking systems the rack bases are solidly bolted or welded to the rack posts. In moveable racking system the horizontal rack components are hung into the post and secured by a locking pin against lifting out.