Three bars AB, AC, and AD are pinned together as shown in the figure. Initially, the assembly is stress free. Horizontal movement of the joint at A is prevented by a short horizontal strut AE. Calculate the stress in aluminum bar AC and steel bar AD. Also, find the force in the strut AE when the assembly is used to support the load W = 12.50 kips. For each steel bar, A = 0.4 in² and E = 29 × 106 psi. For the aluminum bar, A = 0.8 in² and E = 10 × 10⁰ psi. B C D 20% Steel E 35 Aluminum W A Steel

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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.