Redundant Joint Truss Apparatus
Product Code : EL-SELE-10578
Quick Answer: The Redundant Joint Truss Apparatus is a Structures Test Frame accessory that demonstrates redundancy in framed structures by letting students test the same two-support frame first as a determinate structure (with one member removed) and then, after refitting that member, as an indeterminate structure, applying load through a screw thread and electronic load cell while a Digital Force Display and digital deflection indicator record the applied load, strains, and deflection, with an optional Structures Software package available for automatic data acquisition and virtual experiments.
| An experimental apparatus to investigate the principles of redundancy and aspects of safety critical structures using determinate and indeterminate framed structures. | |
| The experiment hardware fitted a Structures Test Frame. | |
| Two supports hold the top and base of one side of a structure. | |
| The top support allows pivoting, the base support allows pivoting and rolling. | |
| Initially, one of the members is missing from the structure, making it determinate. | |
| To make the structure indeterminate, students refit the missing member. | |
| Students manually apply a load to one end of the determinate framework using a screw thread and electronic load cell. | |
| Students use the strains to help them calculate the forces in the structure. | |
| A digital deflection indicator measures displacement in the structure. | |
| Students note applied load, strains and deflection in a determinate framework. | |
| The load cell connects to a Digital Force Display, which shows the applied load. | |
| Each member of the structure has strain gauges attached. | |
| These each connects to a digital strain bridge, which shows the member strains. | |
| They then repeat the experiment with the frame made indeterminate, and analyses and compare their results. | |
| The Operation Manual provides details of the equipment including sample experiment results. | |
| The Operation Manual describes how to use the equipment and gives experiment procedures. | |
| Key features | |
|---|---|
| Structures training module for students of mechanical, civil and structural engineering | |
| Allows safe and practical experiments into determinate and indeterminate structures | |
| Realistic and verifiable experiment results | |
| Optional Structures Software package for extra, ‘virtual’ experiments, that simulate and confirm the results from your hardware and allow extended experiments | |
| Optional unit with Structures Software package for automatic data acquisition and virtual experiments. |
For this and other structural engineering lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India.
Last Updated: September 2026
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