The rectangular beam shown in the figure is subjected to a factored moment Mu= 288 k-ft. ■ Calculate the cracking moment Mcr. ■ Using the transformed area method, determine the moment of inertia of the cracked section (/cr) ■ Calculate the flexural stresses fc, fs, and f's. Use normal weight concrete with f'c = 4000 psi and Ec= 3600 ksi, and Grade 60 steel (fy= 60,000 psi, Es = 29,000 ksi). Steel in 2.5" compression 3 #8 19" 4 #9 Steel in tension 12" 2.5" 24"

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Introduction to Engineering Design

Students are often confused with engineering and design. The term engineering design has two words with different meanings, engineering, and design. The term engineering implies applications of laws and principles of science to design and analyze physical structures and components. In civil engineering, students apply the concept of physics and chemistry to design and build structures and buildings. In engineering disciplines, the term design means determining the dimensions, loads, and associated influences on the component due to the applied loads such as stresses and deformations. The estimation of such parameters is crucial to make the component or structure foolproof.