Self-standing towers are space structures with three or four pillars and are usually built with a maximum height of 120 to 180 meters. The structure of these towers is north of the main foundations and cross-sections and horizontal restraints. Usually in towers with a square cross section (four legs) the angle between the sides of the section is 90 degrees and in towers with a triangular cross section (tripod) is 60 degrees.
These types of rigs are designed and produced in different wind levels and wind speeds.
The pyramidal slope of this type of mast is a maximum of one degree and the mentioned slope can extend to the end section of the rig.
The minimum number of prefabricated foundation layers for the lightest type of these towers is 4 layers with a thickness of 30 cm.
Elimination of reinforcement time and gripping of the foundation, significant reduction of small rig parts, reduction of German deviation, high uplift speed, are the special features of this type of rig