Given: A doubly reinforced rectangular concrete beam is subjected to a factored ultimate moment M=1396 kN.m. Assume f=28 MPa, 1, = 420 MPa. Assume d' = 75 mm, d= 700 mm, and b= 380 mm. Design the section for this ultimate moment. Consider that Pmax =P0.005 0.01806 as singly reinforced beam. Keep the draft of your calculations with you; just fill your answers to the questions shown below, and no need to send any attachment.
Check the capacity of the section if singly reinforced, and calculate M_d,max= KN.m
What is the required area of tension steel A_s (mm²) ? mm
What is the required area of compression steel A'_s (mm)? mm
A'_s =
What will be the compression steel (A) condition at ultimate?