Engineering Homework Help

Please do these questions handwritten and neat. (Due within a day and 15 hrs)

Problem 13.3.A. A rectangular concrete beam has fc = 3000 psi [20.7 MPa] and steel with fy = 40 ksi [276 MPa]. Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment due to dead load of 60 kip-ft [81.4 kN-m] and a moment due to live load of 90 kip-ft [122 kN-m].

TABLE 13.3 Minimum Required Tension Reinforcement for Rectangular Sectionsa

fc (psi) 3000

4000 5000

fy = 40ksi 0.0050

0.0050 0.0053

fy = 60ksi 0.00333

0.00333 0.00354