1. Classification of truss:

A truss can be classified in the folowing different categories:

1. Assumptions made in the analysis of perfect truss:
   1. The joints of a truss are assumed to be pin connection and frictionless. The joints, therefore cannot resist movements.
   2. The truss is loaded at the joints only.
   3. The members of the truss are straight, uniform and they are two force members.
   4. The weight of the members are negligibly small.
   5. The truss is statically determinate.