Question

ACI Section 9.7.6.2.2 sets the maximum spacing of vertical stirrups at d/2 or d/4 along the length of the beam as shown below. Explain why. 9.7.6.2.2 Maximum spacing of legs of shear reinforcement along the length of the member and across the width of the member shall be in accordance with Table 9.7.6.2.2. Table 9.7.6.2.2-Maximum spacing of legs of shear reinforcement

Answer 1

The maximum spacing of vertical stirrups along the length of a beam is set at d/2 or d/4 to provide adequate shear reinforcement and prevent diagonal cracks.

Step-by-step explanation:

The maximum spacing of vertical stirrups along the length of a beam is set at d/2 or d/4 according to ACI Section 9.7.6.2.2. This ensures that the shear reinforcement is adequately distributed and provides sufficient confinement to the concrete. When stirrups are placed at d/2, they are located closer to the center of the beam, which helps in resisting shear forces. When stirrups are placed at d/4, they are located towards the edges of the beam, which helps in limiting the formation of diagonal cracks.

Answer 2

The maximum spacing of vertical stirrups along the length of a beam is set at d/2 or d/4 to provide adequate shear reinforcement and prevent diagonal cracks.

The maximum spacing of vertical stirrups along the length of a beam is set at d/2 or d/4 according to ACI Section 9.7.6.2.2.

This ensures that the shear reinforcement is adequately distributed and provides sufficient confinement to the concrete.

When stirrups are placed at d/2, they are located closer to the center of the beam, which helps in resisting shear forces.

When stirrups are placed at d/4, they are located towards the edges of the beam, which helps in limiting the formation of diagonal cracks.