Patent ID: 8758879

Claim:
A composite hat-stiffened pressure web comprising: an uncured composite pressure web; and, a composite hat stiffener bonded or co-bonded to the uncured composite pressure web, the composite hat stiffener being pre-cured and comprising: a composite hat section having a first side and a second side; a plurality of composite stiffening plies coupled to the composite hat section, the plurality of composite stiffening plies comprising: a body ply coupled to the first side of the composite hat section; a wrap ply coupled to the body ply, the wrap ply having a wrap ply slot opening formed in a base portion of the wrap ply; and, a base ply coupled to the body ply and the wrap ply, the base ply having a base ply slot opening; a vacant composite hat stiffener slot opening positioned at a base portion of the composite hat stiffener and formed by alignment of the wrap ply slot opening and the base ply slot opening; a pair of radius filler noodles coupled to the composite hat section and disposed between the plurality of composite stiffening plies; and, an outer ply coupled to the second side of the composite hat section, the outer ply comprising a glass material and a galvanic corrosion protection material.