Abstract: Structural members of work machines experience heavy forces and the structural member must be able to endure such heavy forces, but must also be sufficiently light to prevent the work machine from using most of its available power to manipulate the structural member. The present apparatus facilitates the heavy-duty construction along with a reduced weight by comprising top and bottom portions, a middle portion attached between and substantially perpendicular with the top and bottom portions, and a primary coupling formed at a first-end portion of the structural member and extending from at least one of the top, bottom, and middle portions to define a substantially I-shaped structural member.