Question 1

How do I connect 3-point trusses?

Accepted Answer

3-point trusses are connected using cone connectors (conical spigots). Each truss section has three chord tubes, and you insert one cone connector into each tube at the joint. The connectors are then secured with bolts and split pins to create a rigid, load-bearing connection. Always ensure connectors are fully inserted, bolts are tightened to the correct torque, and split pins are properly installed to prevent accidental disconnection. Inspect all connections before loading the truss system.

Question 2

What are the standard dimensions of 3-point trusses?

Accepted Answer

Standard 3-point trusses typically feature chord tube diameters of 35 mm or 50 mm, with wall thicknesses ranging from 2 mm to 3 mm depending on the load rating. The triangular cross-section commonly measures 220 mm to 290 mm across (edge to edge). Straight sections are available in modular lengths from 0.5 m to 5 m, with some manufacturers offering custom lengths. The specific dimensions determine the truss's load capacity, with larger tube diameters and thicker walls supporting heavier loads.

Question 3

What corner pieces are available for 3-point trusses?

Accepted Answer

3-point truss systems offer a comprehensive range of corner pieces and junction modules. Standard options include 90° two-way corners for right-angle connections and 135° corners for angled structures. Multi-way junctions include 3-way T-pieces (horizontal and vertical), 4-way cross-pieces, and specialised 5-way or 6-way corners for complex designs. Each corner piece maintains the same chord tube diameter and triangular cross-section as the straight sections, ensuring consistent load distribution and structural integrity throughout the assembled framework.

Question 4

What's the difference between 3-point and 4-point trusses?

Accepted Answer

3-point trusses feature three chord tubes arranged in a triangular cross-section, while 4-point trusses have four chord tubes in a square configuration. The triangular design of 3-point trusses offers a more compact, visually streamlined profile with lower weight, making them ideal for most stage, exhibition and event applications. 4-point trusses provide higher load capacities and greater torsional rigidity, making them the preferred choice for heavy-duty rigging, long spans and applications requiring maximum strength. For typical event technology needs, 3-point trusses deliver the optimal balance of performance and practicality.

Question 5

When do I need spacers between trusses?

Accepted Answer

Spacers (also called spreader bars or distance tubes) are required when you need to maintain a fixed gap between parallel truss sections. Common applications include mounting banners, fabric panels, LED screens or decorative elements that require a specific depth or standoff distance. Spacers ensure the gap remains constant under load and prevent the parallel trusses from twisting or moving relative to each other. They're essential for creating stable, professional-looking installations where visual alignment and structural rigidity are critical.

Question 6

What load capacity do 3-point trusses have?

Accepted Answer

The load capacity of 3-point trusses varies significantly based on tube diameter, wall thickness, span length and support configuration. Lightweight systems with 35 mm tubes and 2 mm walls typically support distributed loads of 50–150 kg over short spans. Standard 50 mm systems with 2 mm walls handle 200–400 kg depending on span and support points. Heavy-duty 50 mm systems with 3 mm walls can support 400–800 kg or more. Always consult the manufacturer's certified load tables for your specific truss model, span length and support configuration, and never exceed published Working Load Limits.

Question 7

Are 3-point trusses suitable for outdoor events?

Accepted Answer

Yes, 3-point trusses are widely used for outdoor events, festivals and temporary structures. However, outdoor applications require additional considerations including wind load calculations, appropriate ground support systems, ballast or anchoring, and weather protection for connections. Aluminium trusses are naturally corrosion-resistant, but regular inspection and maintenance are essential, especially after exposure to rain or humidity. For outdoor installations, always work with certified load calculations that account for wind forces, and ensure your ground support system is adequately ballasted or anchored to prevent structural failure.

Question 8

Which 3-point truss system should I buy for stage lighting?

Accepted Answer

For stage lighting applications, choose a 3-point truss system with 50 mm chord tubes and at least 2 mm wall thickness, such as the Naxpro FD31-44 series. This specification provides sufficient load capacity for typical moving heads, LED panels and conventional fixtures while maintaining a professional appearance. Ensure the system is TÜV certified and DGUV Regulation 17 compliant, and select a manufacturer who provides comprehensive load tables and technical documentation. For heavier lighting rigs or longer spans, consider heavy-duty systems with 3 mm wall thickness (e.g. Naxpro HD31-44) to ensure adequate safety margins.

3-Point Trusses