Abstract: A removable work surface defining device includes a pair of rigid support members attachable to a support structure, a platform defining a work surface surrounded by spaced apart opposite front and rear edge portions and spaced apart opposite side edge portions extending between the front and rear edge portions, and a pair of quick release locking mechanisms each for releasably attaching the platform at a respective one of the opposite side edge portions thereof upon an adjacent respective one of the rigid support members. Each of the quick release locking mechanisms includes first and second sets of elements, a locking latch and a catch. The first and second sets of elements are disposed on respective ones of the rigid support members and adjacent respective ones of the opposite side edge portions of the platform for undergoing relative movement between released and interengaged positions with one another upon movement of the platform between first and second positions relative to the rigid support members.