9.9 A No. 32 (metric designation) reinforcing bar for concrete has a diameter of 32 mm. The bar is cut to length in a shear apparatus as shown. The required force P for the shearing operation is 300 kN. Determine the ultimate shear strength T(ult) for this bar. P bor Jady, al No. 32 reinforcing bar PROBLEM 9.9 9.10 In the bolted connection of Figure 9.12, assume that the bolts are in. in diameter and that the allowable shear stress for the bolts is 14,500 psi. Based on bolt shear only, compute the safe allowable load P that may be applied. 9.11 Compute the force required to punch a 1-in.-diameter hole through a -in.-thick boiler plate. The ultimate shear strength for the material is 42,000 psi. ubiected to a 6000-lb ten-

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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.