Hinged or Pinned Support:
In this case, the beam is hinged or pinned to the support. A pinned or hinged support gives just two reactions, one against vertical movement & another against horizontal movement (say Rx or Ry) but offers no resistance to the angular rotation of the beam at the hinge. The reaction shall pass through the centre of the hinge or pin.
HA - Horizontal Reaction at the Support 'A'
VA - Vertical Reaction at the Support 'A'
Figure: Hinged or Pinned Support