A truss is a framework of slender members connected at joints. When all truss members lie in a single two-dimensional plane, it is called a planar truss. The basic planar truss is a simple truss comprising three members in a triangular arrangement. It can be expanded by the strategic addition of two members and a joint. The design and analysis of the truss rely on two simplified assumptions. Firstly, external loads are applied at joints, and the weight of each member is negligible. When the weight of a member is significant, half of its magnitude is applied as equally distributed vertical forces at both ends. Secondly, although members connect with welded, bolted or riveted joints, the joints can be assumed as smooth pins, provided the centerlines of the joining members are concurrent. These assumptions ensure that truss members act as two-force members experiencing axial compression or tension. The rigidity and determinacy of a simple truss dictate that the number of members m and the number of joints j are related through an equation.