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A rectangular reinforced concrete beam with dimensions b = 14in, d = 25in, and h = 28in is reinforced with three No. 10 bars. Material strengths are fy = 60,000 psi and fc prime = 5,0000 psi.
a.) Find the moment that will produce the first cracking at the bottom surface of the beam, basing your calculation on I gross, the moment of inertia of the gross concrete section.
b.) Repeat the calculation, using Iut, the moment of inertia of the uncracked transformed section.
c.) Determine the maximum moment that can be carried without stressing the concrete beyond 0.45 fc prime or the steel beyond 0.60fy.
d.) Find the nominal flexural strength from part (d.) to the service capacity from part (c.). e.) Compute the ratio of the flexural strength from part (d) to the service capacity from part (c).
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The maximum flexural stress on a transverse cross section of a beam2" x 4" with a rectangular cross section must not exceed 8 ksi.Determine the maximum resisting moment Mr that the beamcan support if the neutral axis is
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A 10 X 106 m3 lake is fed by a polluted stream having a flow rate of 5 m3/s and a pollutant concentration of 10 mg/L. There is also a sewage outfall that discharges 0.5 m3/s of wastewater having a pollutant concentration of 100 mg/L. The stream and s..
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