Thomas Truss 20.5″: General Purpose Aluminum Box Truss for Stage and Event Production
The Thomas General Purpose 20.5″ box truss is one of the most widely used truss systems in professional stage lighting and event production, trusted for its balance of load capacity, span capability, and compatibility with the broader JTE ecosystem of corners, pivots, and accessories. Available in 10-foot sections with 2-inch OD main chords and 1-inch OD diagonals in aluminum, it is the standard choice for lighting rigs, PA hangs, ground support systems, and large overhead frames across touring and installed production applications.
Load Chart
All loads include a 20% overload factor for dynamic effects and are in addition to the self weight of the truss. Loads are per the structural report by Broadhurst, Goodwin and Dunn for truss manufactured after November 1993.
Maximum Allowable Uniform Loads:
- 10′ span: 5,741 lbs
- 20′ span: 5,741 lbs
- 30′ span: 3,706 lbs (approx.)
- 40′ span: 2,781 lbs (approx.)
- 50′ span: 2,124 lbs (approx.)
Maximum Allowable Center Point Loads:
- 10′ span: 2,870 lbs
- 20′ span: 2,870 lbs
- 30′ span: 1,853 lbs (approx.)
- 40′ span: 1,390 lbs (approx.)
- 50′ span: 1,062 lbs (approx.)
For exact deflection values and extended span data, refer to the official JTE load chart linked in the user manual above.