Abstract: A composite cruciform structure adapted for securely joining two or more intersecting fiber based composite structural members of an airframe and the like, is disclosed. A first bundle of graphite or other fibers of high strength is intimately interwoven with a second bundle of like fibers, with each bundle of fibers extending in a different direction and being aligned with the general longitudinal axis of a respective first and second composite structural member. A third bundle of fibers is interwoven with both the first and second bundles of fibers to form the cruciform structure. The bundles of fibers are reinforced with a suitable cured resin. The cruciform structure may comprise an integral part of the respective structural members, or may be attached thereto by splicing.