A lower joint for a wing assembly of an aircraft, the lower joint comprising: an outboard lower wing panel of an outboard wing box; a center lower wing panel of a wing center section; a rib that defines an interface between the outboard wing box and the center wing section; and a lower joint assembly operatively interconnecting the outboard lower wing panel, the center lower wing panel, and the rib, wherein the joint assembly includes: two outboard flanges (40, 42), wherein the outboard lower wing panel extends between the two outboard flanges (40, 42) in a double shear arrangement; an inboard flange operatively coupled to the center lower wing panel; an upper flange operatively coupled to the rib; characterized in that the outboard lower wing panel is constructed substantially of a first material; wherein the center lower wing panel is constructed substantially of a second material that is different from the first material; and wherein the lower joint assembly is constructed substantially of a third material that is different from the first material and the second material; wherein the lower joint assembly includes: one or more lower splice plates that defines a lower of the two outboard flanges (40, 42); an upper T-fitting (56,57) that defines an upper of the two outboard flanges (40, 42) and the upper flange; and either the one or more lower splice plates are directly coupled to said upper T-fitting or the lower joint further comprises one or more intermediate plates operatively and directly coupled between the one or more lower splice plates and the upper T-fitting and the one or more intermediate plates define the inboard flange. an outboard lower wing panel of an outboard wing box; a center lower wing panel of a wing center section; a rib that defines an interface between the outboard wing box and the center wing section; and a lower joint assembly operatively interconnecting the outboard lower wing panel, the center lower wing panel, and the rib, wherein the joint assembly includes: two outboard flanges (40, 42), wherein the outboard lower wing panel extends between the two outboard flanges (40, 42) in a double shear arrangement; an inboard flange operatively coupled to the center lower wing panel; an upper flange operatively coupled to the rib; characterized in that the outboard lower wing panel is constructed substantially of a first material; wherein the center lower wing panel is constructed substantially of a second material that is different from the first material; and wherein the lower joint assembly is constructed substantially of a third material that is different from the first material and the second material; wherein the lower joint assembly includes: one or more lower splice plates that defines a lower of the two outboard flanges (40, 42); an upper T-fitting (56,57) that defines an upper of the two outboard flanges (40, 42) and the upper flange; and either the one or more lower splice plates are directly coupled to said upper T-fitting or the lower joint further comprises one or more intermediate plates operatively and directly coupled between the one or more lower splice plates and the upper T-fitting and the one or more intermediate plates define the inboard flange. two outboard flanges (40, 42), wherein the outboard lower wing panel extends between the two outboard flanges (40, 42) in a double shear arrangement; an inboard flange operatively coupled to the center lower wing panel; an upper flange operatively coupled to the rib; characterized in that the outboard lower wing panel is constructed substantially of a first material; wherein the center lower wing panel is constructed substantially of a second material that is different from the first material; and wherein the lower joint assembly is constructed substantially of a third material that is different from the first material and the second material; wherein the lower joint assembly includes: one or more lower splice plates that defines a lower of the two outboard flanges (40, 42); an upper T-fitting (56,57) that defines an upper of the two outboard flanges (40, 42) and the upper flange; and either the one or more lower splice plates are directly coupled to said upper T-fitting or the lower joint further comprises one or more intermediate plates operatively and directly coupled between the one or more lower splice plates and the upper T-fitting and the one or more intermediate plates define the inboard flange. one or more lower splice plates that defines a lower of the two outboard flanges (40, 42); an upper T-fitting (56,57) that defines an upper of the two outboard flanges (40, 42) and the upper flange; and either the one or more lower splice plates are directly coupled to said upper T-fitting or the lower joint further comprises one or more intermediate plates operatively and directly coupled between the one or more lower splice plates and the upper T-fitting and the one or more intermediate plates define the inboard flange.