The total value of these additional resistances lies widely and accurate preliminary calculations, «obviously, it cannot be expressed. In separate examples, the total strength of all devices installed for the movement gives a 5 — 8 -time supply against the traction power calculated by friction. With very careful implementation of all preparatory work, force, actually required for movement, sometimes even less theoretically calculated and is only 1.5 — 2 °/0 from the weight of the building.
Disadvantages of the use of jacks: what to take into account
