Shear design of reinforced concrete (RC) beam involves the determination of spacing between stirrups. Shear is a word used for forces that work perpendicular to the longitudinal axis of RC beam. … RC concrete beams cracks in flexure due to principal tension stresses which are horizontal in the middle of the beam span.
If external loads act far away from the vertical plane of bending, the beam is subjected to twisting about its longitudinal axis, known as torsion, in addition to the shearing force and bending moment. Torsion on structural elements may be classified into two types; statically determinate, and statically indeterminate.