Photo Credit: Alex Mead
Seen above is the resteel for a reinforced concrete beam in a parking structure laid out before the concrete is poured. The epoxy coated rebars on top (green color) help in beam design by adding ductility to the section. The post-tension tendons (blue color) take the tension force on the bottom of the beam and greatly increase the strength of the beam section. Stirrups are the vertically oriented rebar (green color) pieces hanging from the horizontal rebars. Stirrups are placed at varying intervals to resist the shear force which changes along the length of the beam.