The arrangement of jacks for elements of the frame that supports the genes is made at distances between centers from 25 cm to 1 m.
With a significant number of lifting devices, their maintenance becomes quite difficult. It is usually carried out by the arrangement of workers at the rate of one person for 15 — 20 jacks. The twisting of the latter is twisted on a predetermined insignificant amount of rise of 2 — 3 mm (a quarter of the screw turnover) and is carried out simultaneously by all workers on the sound signal given by the manager. Each of the workers at one reception of lifting passes its own group “Fats there and back,
