An aircraft wing is provided having a spanwise wing spar which includes a one-piece upright central web extending in a spanwise direction between inboard and outboard ends of the wing spar, and a plurality of contiguously adjacent wing spar sections. At least a first wing spar section includes at least one upper and lower spar chord which is unitarily formed as a one-piece structure with upper and lower ends of the upright central web, respectively, while at least a second wing spar section includes at least one upper and lower spar chord which is a separate structural element integrally fixed to the upper and lower ends of the upright central web, respectively.