Patent ID: 8752791

Claim:
A fuselage structure, comprising: a fuselage body comprising an inner surface, an upper portion having a crown, a cabin beneath the crown, and a lower portion; and a structural framework for stiffening the fuselage body, the structural framework comprising a plurality of arched frame members attached to the inner surface of the upper portion of the fuselage body and extending transversely across the crown wherein a number of the plurality of arched frame members each is filled with a structural foam and includes a duct surrounded and supported by the foam, each duct extending downwardly from the crown toward the cabin for routing a utility through the fuselage body, in which the structural framework and the upper portion are co-cured; and a utility supply duct extending longitudinally through the fuselage body along the crown and coupled with each duct of the number of the plurality of arched frame members, wherein the utility supply duct forms a backbone frame and is integral with the arched frame members.