FF-1102 Roof Truss Apparatus


  • Measurement of bar forces (ties and Rafter).
  • Calculation of bar forces by the method of joints.
  • Comparison: measurement result-calculation-graphical method.


This apparatus is used to measure the deformation in elements of roof truss. Whenever a load is applied to a roof truss, its members undergo a strain.

This unit consists of a base structure which provides the support locations for the roof truss. Three metallic elements form a roof truss in a triangular shape. Load is applied from the top of the roof truss structure via a hanger. Each member has a dial gauge connected to it which shows the deformation produced due to applied load in each member.