An integrated bracket assembly for attachment to a convex outer corner surface of a torsion box of an aerofoil structure, the bracket assembly comprising a bracket strip having a plurality of brackets arranged spaced side by side, and connected by an infill rail integrally formed with the bracket strip, wherein the infill rail has a concave surface for mating with the convex surface of the torsion box. The torsion box may be of a “U-box” construction where a front spar and a rear spar are integrally formed with either an upper or lower torsion box cover to form an omega-shaped unitary component, and the other cover is attached to the omega-shaped component to provide an enclosed volume. The bracket strip may be used for attaching a leading/trailing edge structure of the aerofoil to the torsion box.