Double -footed cranes move along the rail tracks. During the rise of the cargo, sleeping taps are placed under the supporting frames. Due to the fact that the weight of the prefabricated elements reaches 40-60 tons, their rise can be made only simultaneously with two double-axis cranes. For lifting columns, traverses are used with a capture at one point of the column. Double -flowing taps put in such cases one directly near the other. For the capture and lift of the beams, one traverse is used for each crane with the capture of the beam at only four points. Double -flowing cranes move from one row of frames to the other along the tablet perpendicularly laid in the form of the letter to the rail tracks, and the running wheels of the crane during the transition to the perpendicular path are rotated. Simultaneously with the organizational plan, a schedule for the performance of work should be drawn up. The decisive factor for the successful installation of prefabricated structures is an accurately developed schedule. Without a schedule, it is impossible to coordinate individual work processes, and as a result, the deadlines for the performance of work cannot be maintained. The installation of elements is usually performed at a faster pace than the very manufacture of elements. Therefore, the schedule of installation of prefabricated structures is always limited by the schedule of the manufacture of elements, and not the schedule of their lifting and installation. The schedule for the manufacture of supporting structures depends, as a rule, on the performance of work on the installation of foundations, since the implementation of the load -bearing structures to the device of foundations and the concrete floor of the workplace, of course, is not possible.
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