ALUTRUSS QUADLOCK TQ390-4000 is a four-point aluminium truss cross beam with a length of 400 cm and outer dimensions of 39 × 39 cm. Its four main chords use 50 mm aluminium tubes with 2 mm wall thickness, while the 20 mm braces also have 2 mm wall thickness. The conical connection system uses cones, pivots and pins, and the Quick-Lock design supports assembly and dismantling. The truss weighs 21 kg.