Problem 15.15 Determine the required spacing of #13 closed stirrups at a distance d from the face of the support for the beam shown assuming that the torsion decreases uniformly from the beam end to the beam centerline. The member is subjected to a 34-kN⚫m service dead load torsion and a 40-kN·m service line load torsion at the face of the support, fy=420 MPa, f = 24 MPa, and clear cover = 40 mm. (Ans. 175 mm) D= 10 kN/m (including beam weight) L = 25 kN/m 5 #32 700 mm +45 450 mm- 7 m.