A tension-only member for a truss structure and a method of operating a vehicle with tension-only members is provided. Tension-only members readily deform when a compressive load is applied. The tension-only members may be a leaf spring, a strap, a cable, or a rope between two connector ends. The tension-only members are placed diagonally in a truss such that the tension-only members support a load applied in one direction but deflect when a load is applied in an opposite direction. A truss structure with such tension-only members can be flexible to enable a vehicle frame to which it is attached to flex.