A thin-skin side-stay beam (102) may include an upper arm (112) with thin skin and a mating flange (202) extending longitudinally from the thin skin. A lower arm (110) may also have a thin skin and a mating flange (204) extending longitudinally from the lower arm (110). A joint (116) may include a pin and/or a bushing extending through the mating flanges (202, 204) to pivotally couple the upper arm (112) to the lower arm (110). The upper arm (112) and/or the lower arm (110) may include one or more internal walls defining one or more internal cavities.