Square section heavy duty aluminium truss twist-resistant version with 29 cm long sides.
- Chords A: extruded tube Ø 48 x 3 mm EN AW 6082 T6
- Diagonals B: extruded tube Ø 20 x 2 mm EN AW 6082 T6
- Ends C: aluminium casting plate EN AC 42200 T6
- Connection systems QXFC: quick-fit kit; QXSM10: bolt connection kit
It substitutes the old Heavy Duty series QD30S and QD30SA. It is characterized by the introduction of Ø 48x3 mm chords and Ø 20x2 mm diagonals on all the faces. This truss constitutes Varitower 3 – 30 and Flyintower 9.5-600.