This mixed adapter is designed to allow an angular displacement of around 20° between the screw jacks and, for example:
- the upper spreader bars,
- the mass-side spreader bar,
- the spreader bar under RL 15.
The degree of freedom obtained with this mixed adapter allows the two-flange saddle to be installed at an angle of a few degrees to the plumb line of the spreader bar and the load pick-up brackets.