Patent ID: 7239528

Claim:
An electronic system, comprising: a first set of circuit boards; a second set of circuit boards; and a support assembly configured to support the first set of circuit boards and the second set of circuit boards, the support assembly including: a midplane defining a first surface configured to connect with the first set of circuit boards and a second surface configured to connect with the second set of circuit boards; a first set of outer side panels coupled to the midplane, the first set of outer side panels defining first card cage structures which are referenced from the first surface defined by the midplane, the first card cage structures being configured to support the first set of circuit boards when the first set of circuit boards connect with the first surface defined by the midplane; a second set of outer side panels defining second card cage structures, the second card cage structures being configured to support the second set of circuit boards when the second set of circuit boards connect with the second surface defined by the midplane; and a set of joiners coupled to both the first set of outer side panels and to the second set of outer side panels, the set of joiners being configured to position the second set of card cage structures in a fixed position relative to the midplane so that the second card cage structures are referenced from the second surface defined by the midplane.