The apparatus is equipped with eight hinged steel members, a rigid aluminum frame, and an 8-channel selector (switch box) for strain measurement. The truss members are arranged to allow investigation of both statically determinate and statically indeterminate truss configurations. Each truss member is instrumented with four strain gauges in a full Wheatstone bridge configuration, providing accurate measurement of axial force and elongation with inherent temperature compensation. The loading system consists of a handwheel-driven mechanism capable of applying loads up to 100 kgf, together with a 200 kgf load cell with 0.5% full-scale accuracy for measuring the applied force. The apparatus includes two portable digital indicators (STI-50 model): one for displaying the externally applied load and the other for indicating the internal axial force in each truss member via the selector switch. In addition, two high precision dial gauges with a resolution of 2 µm are provided for measuring the overall truss deflection.