The forces in the beam modeling the outer ring are shown. The force Fa is in the direction of the bearing axis, therefore it is a shear force in the beam. The force Fr is a shear force in radial direction and Ft is the tangential force, so it is tension (positive) or pressure (negative) in the beam.
We can also see that loads are only introduced at 0°, 60° and 300°, so only three rolling elements are under load.
