2. A concrete slab of uniform thickness weighs 20,000 lb and is supported by two steel rods shown on the link below. The initial length of rod AB is 2 ft. and the initial length of rod CD is 3 ft. Rod AB has a cross-sectional area of 1 in² and rod CD has a cross-sectional area of 2 in?. The modulus of elasticity of steel is 30 x 106 Ib/in?. Calculate the elongation of both rods in inches. Click on the following link to see the figure: I1 p2.jpg Elongation of rod AB (in.) Elongation of rod CD (in.)= %3D

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Material Properties

Construction in civil engineering demands high strength, durability, and longevity. These targets can be achieved by better design and analysis, along with the correct choice of materials. Different materials have different properties and hence, they respond and performs differently under the various condition of external loadings. It is therefore a critical task of an engineer to select the right material based on the property that the material is supposed to function in real-time. When speaking about the property, there are different categories of material properties like chemical property, physical property, mechanical property, electrical property, magnetic property, thermal property, etc. These material properties form the basis of material selection in various applications.