a deployable geodesic truss structure can be deployed from a stowed state to an erected state . the truss structure includes a series of bays , each bay having sets of battens connected by longitudinal cross members which give the bay its axial and torsional stiffness . the cross members are hinged at their mid point by a joint so that the cross members are foldable for deployment or collapsing . the bays are deployed and stabilized by actuator means connected between the mid point joints of the cross members . hinged longerons may be provided to also connect the sets of battens and to collapse for stowing with the rest of the truss structure .