alutruss quadlock tq390 2500 4 way cross beamQUADLOCK TQ390 4 point truss systemQUADLOCK TQ390 is a 4 point truss system made of aluminum. The individual elements are connected via four cones, pivots and pins. The advantage of the conical connection system is that the cones completely fit into the main chords so that highest load capacity is guaranteed. The Quick Lock system enables fast, efficient and highly aesthetic assembly when the truss constructions are frequently assembled and