Two steel plates are welded to a rolled W section as indicated. If the area and the centroid location of each subsection are given in the table below, what is the moment of inertia with respect to x axis? (Height of W14x38 section is 14.1 inches.) у W 14x 38 х T 1.0 in - a 13 in 13 in. - Area (in2) ko (in4) Section W 14 x 38 11.2 385 Upper plate 26 2.167 Lower plate 26 2.167 385 11.2 x 7.052 389.33 11.2 x 7.052 389.33 11.2 x 7.052 + 26 x 7.552 x 2 389.3326 x 7.552 x 2

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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.