Event Lighting T4BL3 400mm Spigot Box Truss (3m) (Silver)

The Event Lighting T4BL3 400mm spigot box truss is a purpose-built aluminium lighting structure engineered for mid-scale DJ rigs, festival installations, and live venue setups. Constructed from 6061–T6 aluminium alloy with TUV certification, this 3-metre span section delivers the structural integrity demanded by professional lighting rigs that carry significant LED and moving head payloads. The 400mm profile allows efficient rigging of multiple fixtures whilst maintaining a relatively compact footprint for transport and setup.

Each section features a 50mm × 3mm main tube coupled with 50mm × 2mm vice braces and 25mm × 2mm diagonal braces, yielding a centre point load capacity of 1300 kg across the full 3-metre span. The washed aluminium finish resists corrosion in outdoor and high-humidity venues. Load ratings across multiple configurations—uniform load, centre point, two-point, and three-point distributions—enable precise calculation of fixture weight distribution. Box truss sections are available in 0.2, 0.5, 1, 1.5, 2, 2.5, 3, and 4 metre increments, allowing flexible rig configurations from intimate club installations to larger festival lighting arrays.

Critical installation note: this ladder-style truss requires chords facing downward when positioned horizontally to maintain all published load ratings. Incorrect orientation voids load certification. DJs and lighting techs integrating this into performance rigs should factor the structural demand curve when stacking fixtures—a 1-metre span handles 2000 kg uniform load, whilst the full 3-metre section supports 1300 kg, reflecting standard beam deflection principles.

Features

• 400mm box truss profile with 50mm × 3mm main tube construction
• 6061–T6 aluminium alloy with TUV structural certification
• 1300 kg centre point load rating across 3 metre span
• Available in eight lengths: 0.2 to 4 metres
• Vice braces: 50mm × 2mm; diagonal braces: 25mm × 2mm
• Washed aluminium finish for weather and corrosion resistance
• Spigot connection for universal lighting rig integration
• Chords must face downward in horizontal position for load rating compliance