A fuselage portion, comprising: a frame; a floor beam, attached to the frame and comprising ends (204A, 204B); a first structural stanchion, comprising a first end and a second end; a first structural coupling, joining the first end of the first structural stanchion and the floor beam; a second structural coupling, joining the second end of the first structural stanchion and the frame; a second structural stanchion, comprising a first end and a second end; a third structural coupling, joining the first end of the second structural stanchion and the floor beam; a fourth structural coupling, joining the second end of the second structural stanchion and the frame; characterised by: a first non-structural stanchion, comprising a first end and a second end; a first non-structural coupling, joining the first end of the first non-structural stanchion and the floor beam; a second non-structural coupling, joining the second end of the first non-structural stanchion and the frame; a second non-structural stanchion, comprising a first end and a second end; a third non-structural coupling, joining the first end of the second non-structural stanchion and the floor beam; and a fourth non-structural coupling, joining the second end of the second non-structural stanchion and the frame; and wherein: the first and second non-structural stanchions are laterally inboard of the first and second structural stanchions relative to the ends (204A, 204B) of the floor beam; and the first and second structural stanchions are designed to support substantially all the load of the floor beam such that the first and second non-structural stanchions do not bear any load of the floor beam, thereby allowing the first and second non-structural stanchions to be more easily installed and uninstalled to accommodate the installation of a cargo liner and systems (212, 214, 215). a frame; a floor beam, attached to the frame and comprising ends (204A, 204B); a first structural stanchion, comprising a first end and a second end; a first structural coupling, joining the first end of the first structural stanchion and the floor beam; a second structural coupling, joining the second end of the first structural stanchion and the frame; a second structural stanchion, comprising a first end and a second end; a third structural coupling, joining the first end of the second structural stanchion and the floor beam; a fourth structural coupling, joining the second end of the second structural stanchion and the frame; characterised by: a first non-structural stanchion, comprising a first end and a second end; a first non-structural coupling, joining the first end of the first non-structural stanchion and the floor beam; a second non-structural coupling, joining the second end of the first non-structural stanchion and the frame; a second non-structural stanchion, comprising a first end and a second end; a third non-structural coupling, joining the first end of the second non-structural stanchion and the floor beam; and a fourth non-structural coupling, joining the second end of the second non-structural stanchion and the frame; and a first non-structural stanchion, comprising a first end and a second end; a first non-structural coupling, joining the first end of the first non-structural stanchion and the floor beam; a second non-structural coupling, joining the second end of the first non-structural stanchion and the frame; a second non-structural stanchion, comprising a first end and a second end; a third non-structural coupling, joining the first end of the second non-structural stanchion and the floor beam; and a fourth non-structural coupling, joining the second end of the second non-structural stanchion and the frame; and the first and second non-structural stanchions are laterally inboard of the first and second structural stanchions relative to the ends (204A, 204B) of the floor beam; and the first and second structural stanchions are designed to support substantially all the load of the floor beam such that the first and second non-structural stanchions do not bear any load of the floor beam, thereby allowing the first and second non-structural stanchions to be more easily installed and uninstalled to accommodate the installation of a cargo liner and systems (212, 214, 215).