In order to reinforce a column in an existing structure, two channels are continuously welded to the column as shown below.  Fy = 50 ksi for both the column and the channels.  The effective length with respect to each axis is 16 feet. a) calculate the Moment of Inertia about each axis of the built-up shape.   a) what is the available axial compressive strength and what is the percentage increase in strength?  Use both LRFD and ASD.

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Bars

In civil engineering, bars refer to steel reinforcement bars or rebars. These are structural members primarily used for reinforcement purposes in masonry works. A bar is characterized by its cross-sectional area, which is negligible compared to its length. Bars are usually manufactured by steel which is uniform throughout the length, or by meshing multiple steel wires. Other materials of the bar include carbon steel, glass fiber, carbon fiber, and basalt fiber. The reinforcing bars are coated with epoxy resins and other materials to enhance some of their properties including corrosion resistance.