**Statically determinate beam:**

Using the equations of equilibrium given below, if all the reaction components can be found out, then the beam is a statically determinate beam.

The equations of equilibrium are

ΣFx= 0 ΣFy= 0 ΣM= 0

**Analysis of plane truss:**

A plane truss is when the members of the truss lie in a single plane (2D analysis).

**Simple truss**

The basic element of a plane truss is a triangle. Three bars joined by pins at their ends constitute a rigid frame.

A non-rigid, moveable frame can be made with four or more bars joined at their ends. This can be made rigid by addition of a diagonal bar.

**Methods of Joints**

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