How to Choose a Spigot Truss System for Concert Stage

When planning a concert stage, the truss system is the backbone of your setup. A spigot truss system—which uses tapered pins (spigots) for fast connection—offers a balance of speed, strength, and reliability. This guide will help you understand the key specifications, compare available models, and make an informed decision for your next event.

Why Spigot Truss?

Spigot connections are popular in touring and staging because they allow quick assembly without loose parts. The male/female spigots align and lock with a pin, reducing setup time. All truss models discussed here use 6082/6061-T6 aluminum alloy, known for its high strength-to-weight ratio and corrosion resistance.

Understanding Load Tables

Every truss model comes with a load table showing maximum distributed load (kg/m) and point load (kg) at various spans. These numbers are TÜV-tested and should be your primary reference. Never exceed them. For example, the WRF-29 Ladder Truss can support 168 kg/m distributed load at 3 m span, but only 87 kg/m at 4 m. Always check the span you plan to use.

Comparing Truss Profiles

Ladder Truss (WRF-29)

• Main tube: 50x3mm, sub: 25x2mm, brace: 20x2mm
• Available lengths: 50, 100, 150, 200, 250, 300 cm
• Best for: lightweight lighting grids, short spans. At 6 m, it handles only 26 kg/m.

Triangle Truss (WRT-29)

• Main tube: 50x3mm, sub: 30x2mm, brace: 20x2mm
• Lengths: up to 400 cm
• Good for: roof structures, medium spans. At 8 m, it supports 67 kg/m.

Square Truss (WRS-29, WRS-30)

• Both have 50x3mm main, 25x2mm sub, 20x2mm brace
• WRS-29 and WRS-30 share identical load tables: at 6 m, 317 kg/m distributed.
• Ideal for: main stage support, heavy loads.

Heavy-Duty Square Truss (WRS-40, WRS-4060, WRS-52)

• WRS-40: 50x3mm main, 30x2mm sub, 25x2mm brace. At 8 m: 176 kg/m.
• WRS-4060: 50x3mm main, 50x2mm sub, 30x2mm brace. At 9 m: 210 kg/m.
• WRS-52 (520x520 mm): 50x3mm main, 50x2mm sub, 25x2mm brace. At 12 m: 164 kg/m.
• Use for: large concert stages, long spans, heavy rigging.

Spigot Lifting System

For concert stages, the Spigot Lifting System integrates with these trusses to allow motorized hoisting. It uses the same spigot connection, so you can lift entire truss sections into place quickly.

Sourcing Tips

• Factory-direct: Buying from a Chinese factory like ours (TÜV Rheinland certified, ISO 9001:2015) reduces costs. We ship worldwide.
• Check certifications: Ensure the truss is TÜV-tested. Our load tables are verified.
• Match spans to loads: Use the load tables to select the right model. For a 10 m span, WRS-52 (241 kg/m) is suitable; WRS-29 would fail.
• Consider accessories: Spigot systems often need corner blocks, couplers, and base plates. Confirm compatibility.

FAQ

Q: What is the difference between WRS-29 and WRS-30? A: Both have identical specifications and load tables. The model number may reflect minor design variations, but performance is the same.

Q: Can I mix different truss models in one structure? A: Yes, as long as they share the same spigot size (29 mm for most models). However, load calculations must be done for the weakest element.

Q: How do I ensure the truss is safe for outdoor concerts? A: Use the TÜV-tested load tables and factor in wind loads. Our 6082/6061-T6 aluminum is corrosion-resistant, but we recommend covering truss when not in use.

Q: What lengths are available? A: Most models come in 50 cm increments from 50 cm to 300 or 400 cm. Custom lengths may be available on request.

Conclusion

Choosing the right spigot truss system for a concert stage depends on your span, load requirements, and budget. Start with the load tables, compare the profiles above, and don't hesitate to contact us for engineering support. Our factory in China offers TÜV-tested quality at competitive prices, with worldwide shipping.