Engineering Statics

D-12


Using method of joints, determine the force in each member of the truss shown. State whether each member is in tension or compression.

A diagram of the truss is drawn.
A FBD of the truss is drawn.  Note the single force at the roller at C.


All reactions have been found.
All forces acting at D are drawn.
Force equilibrium in the x-direction gives the force in member BC.
Force equilibrium in the y-direction gives the force in member AC.
Force equilibrium in the y-direction gives the force in member AC.
The forces at point B are drawn.
The force in AB is found.