A parallelogram is a deformable figure, but its sides remain parallel to each other, independently from the distorsion.

Practically, the central mast carries the antennas and support the wind effects. The antennas are fixed on a top platform, articulated to the top of the central mast. This platform is related to the ground with three vertical rods. These vertical rods are related to the mast with horizontal frames, articulated too.

Being one side of the parallelogram (the rods are the other one), the platforms remain parallel to each other and parallel to the ground, which is the "last platform".

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