How to control the verticality of building structures
Until recently, in the practice of high -rise construction of structures (Koprov, Silov) built in sliding formwork, vertical control was carried out by plumbing.
This method of labor -intensive and does not provide satisfactory accuracy of measurements. In recent years, during the construction of the Kopov in the Donbass, to check the position of sliding formwork, vertical visualization devices-anti-aircraft priests like PZL.
For this, special visir stamps are strengthened on the axes of the intersection of formwork planes. The stamps are drawn on transparent material or a grid of squares with a side equal to 1 cm, printed on a triaceta photograph, and digitizing after 5 cm.