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Spigot Truss System for Stage: A Buyer's Guide to Specs, Loads, and Selection

When you're planning a stage setup, the truss system is the backbone of your entire structure. Among the various connection methods, the spigot truss system for stage is a popular choice for its simplicity, speed, and reliability. This guide will walk you through the key specifications, load data, and selection criteria, using real factory-tested numbers from our product range.

What Is a Spigot Truss System?

A spigot truss system uses a conical or cylindrical pin (the spigot) that fits into a matching socket on the adjacent truss section. A locking pin or bolt then secures the connection. This design allows for quick assembly and disassembly, making it ideal for touring, events, and temporary installations. The spigot connection is strong and can handle significant loads when properly rated.

Key Components and Materials

Our spigot trusses are manufactured from aluminum alloys 6082 or 6061-T6. These materials offer a good balance of strength, weight, and corrosion resistance. The main tubes, sub tubes, and brace tubes are all welded into a rigid structure. For example, the WRF-29 ladder truss uses a 50x3mm main tube, 25x2mm sub tube, and 20x2mm brace tube. The WRT-29 triangle truss uses a 50x3mm main tube, 30x2mm sub tube, and 20x2mm brace tube. These dimensions affect the truss's load capacity and stiffness.

Types of Spigot Trusses

There are several common profiles, each suited to different applications:

  • Ladder Truss (WRF-29): A flat truss often used for lighting and sound suspension. It is lightweight and easy to handle, but has lower load capacities compared to square trusses.
  • Triangle Truss (WRT-29): A three-chord truss that provides good strength in one plane. It is often used for roof systems or as a main support beam.
  • Square Truss (WRS-29, WRS-30, WRS-40, WRS-4060, WRS-52): A four-chord truss that offers high load capacities in all directions. It is the most versatile and commonly used for stage roofs, towers, and heavy loads.

Understanding Load Tables

Load tables are critical for safe design. They provide the maximum distributed load (kg/m) and point load (kg) for each span. For example, the WRS-29 square truss at a 4-meter span can support a distributed load of 488 kg/m and a point load of 1466 kg. At a 6-meter span, those numbers drop to 317 kg/m and 948 kg. Always consult the load table for your specific truss and span.

Choosing the Right Truss for Your Stage

When selecting a spigot truss system, consider the following:

  1. Load Requirements: Calculate the total weight of lighting, sound, and scenic elements. Use the load table to ensure your truss can handle the load at the required span.
  2. Span: Longer spans require larger trusses. For spans up to 6 meters, the WRS-29 or WRS-30 may suffice. For spans up to 12 meters, consider the WRS-52.
  3. Application: For a simple lighting rig, a ladder truss might be enough. For a stage roof, you'll need square trusses and a proper roof system.
  4. Compatibility: Ensure all truss sections and accessories (spigots, pins, base plates) are compatible. Our spigot systems are designed to work together seamlessly.

Real Product Data and Links

Here are the specific models we offer, with their key specs and load tables:

  • Spigot Lifting System – Learn more
  • WRF-29 Ladder Truss – Product page
    • Main tube: 50x3mm; Sub tube: 25x2mm; Brace tube: 20x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300 cm
    • Load table: 1m span: 990 kg/m distributed, 990 kg point; 2m: 340/340; 3m: 168/115; 4m: 87/43; 5m: 51/20; 6m: 26/10
  • WRT-29 Triangle Truss – Product page
    • Main tube: 50x3mm; Sub tube: 30x2mm; Brace tube: 20x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300, 350, 400 cm
    • Load table: 3m: 371 kg/m distributed, 557 kg point; 4m: 250/500; 5m: 139/348; 6m: 109/327; 7m: 85/298; 8m: 67/268
  • WRS-29 Square Truss – Product page
    • Main tube: 50x3mm; Sub tube: 25x2mm; Brace tube: 20x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300, 350, 400 cm
    • Load table: 1m: 1942 kg/m, 1942 kg point; 2m: 976/1899; 3m: 658/1766; 4m: 488/1466; 5m: 392/1150; 6m: 317/948
  • WRS-30 Square Truss – Product page
    • Same as WRS-29 in specs and load table.
  • WRS-40 Square Truss – Product page
    • Main tube: 50x3mm; Sub tube: 30x2mm; Brace tube: 25x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300, 350, 400 cm
    • Load table: 3m: 936 kg/m, 718 kg point; 4m: 732/680; 5m: 465/644; 6m: 320/612; 7m: 232/585; 8m: 176/560
  • WRS-4060 Square Truss – Product page
    • Main tube: 50x3mm; Sub tube: 50x2mm; Brace tube: 30x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300, 350, 400 cm
    • Load table: 4m: 805 kg/m, 1610 kg point; 5m: 560/1400; 6m: 403/1209; 7m: 301/1054; 8m: 247/988; 9m: 210/945
  • WRS-52 520x520 Square Truss – Product page
    • Main tube: 50x3mm; Sub tube: 50x2mm; Brace tube: 25x2mm; Material: 6082/6061-T6
    • Lengths: 50, 100, 150, 200, 250, 300, 350, 400 cm
    • Load table: 7m: 460 kg/m, 1255 kg point; 8m: 346/1130; 9m: 303/1008; 10m: 241/923; 11m: 182/885; 12m: 164/782

Sourcing Tips for Buyers

When sourcing a spigot truss system, always ask for load test certificates and material certifications. Our products are TÜV Rheinland tested and our factory is ISO 9001:2015 certified. As a factory-direct supplier, we can offer competitive pricing and customization, but we do not publish pricing online. Contact us with your project requirements for a quote.

FAQ

Q: What is the difference between a spigot truss and a bolt truss? A: A spigot truss uses a pin that inserts into a socket, secured by a locking pin, while a bolt truss uses bolted plates. Spigot systems are faster to assemble and disassemble, making them ideal for touring.

Q: How do I read the load table? A: The load table gives the maximum distributed load (kg/m) and point load (kg) for a given span. For example, a WRS-29 at 4m span can handle 488 kg/m distributed or 1466 kg point load. Always ensure your actual loads are below these values.

Q: Can I mix different truss profiles? A: It is not recommended to mix different profiles in the same structure unless specifically designed to do so. Each truss has its own load characteristics. Use a single profile for consistent performance.

Q: What is the maximum span for a spigot truss? A: The maximum span depends on the truss model and load. For the WRS-52, the load table goes up to 12 meters. For lighter trusses, spans are shorter. Always consult the load table and engineering guidelines.

Conclusion

A spigot truss system for stage offers a reliable and efficient solution for your event infrastructure. By understanding the specs, load tables, and your application needs, you can select the right truss for a safe and successful setup. For more details, explore our product pages or contact our team.