Types of Support:
The supports might be classified into three categories which are following:
1. Simple or free support or roller support,
2. Hinged or pinned support, and
3. A built-in or fixed or encastre support.
A Simple or Free Support or Roller Support
this is a support in which beam rests freely. A roller support is the simplest & gives only one reaction, either in the x direction or in y direction (Rx or Ry) normal to the support and offers no resistance against rotation or lateral movements. The reaction shall be taken as working at a point, though in fact it shall be distributed over some length.
Figure: Simple or Free Support or Roller Support