**Restrained Beams**

In addition to the equations of static equilibrium, relations from the geometry of elastic curve are essential to the study of indeterminate beams. Such relations can be obtained from the study of deflection and rotation of beam. This section will focus on two types of indeterminate beams; the propped beams and the fully restrained beams.

A propped beam is fixed at one end and propped either at the other end or at any other point along its span. If the simple support is removed, propped beam will become cantilever beam. Fully restrained beam is fixed at both ends as shown in the figure above.

**Deflection and Rotation of Propped Beam**

Unless otherwise specified, the boundary conditions of propped beams are as follows.

- Deflection at both ends is zero.
- Rotation at fixed support is zero.

**Deflection and Rotation of Fully Restrained Beam**

Unless otherwise specified, the boundary conditions of propped beams are as follows.

- Deflection at both ends is zero.
- Rotation at both ends is zero.