INSTALLATION OF PREFABRICATED CONCRETE AND CONCRETE STRUCTURES 1.General installation instructions

Pre-storage of structures in the on-site warehouses is allowed only with appropriate justification. The on-site storage must be located within the range of the erecting crane.
The installation of the structures of each overlying floor (tier) of a multi-storey building should be carried out after the design fixing of all the installation elements and the concrete (solution) of the monolithic joints of the load-bearing structures reaching the strength specified in the CPD.
In cases where the strength and stability of structures in the assembly process are provided by welding of the installation joints, it is allowed, if indicated in the project, to install structures of several floors (tiers) of buildings without monolithing the joints. At the same time, the project should provide the necessary instructions on the procedure for installation of structures, welding of joints and monolithing joints.
In cases where permanent connections do not ensure the stability of structures during their assembly, it is necessary to use temporary assembly connections. The design and number of connections, as well as the order of their installation and removal should be specified in the CPD.
Brands of solutions used in the installation of structures for the bed should be specified in the project. The mobility of the solution should be 5-7 cm in depth of immersion of the standard cone, except in cases specifically mentioned in the draft.
The application of the solution, the process of which has already begun, as well as the restoration of its plasticity by adding water are not allowed.
Limit deviations from the alignment of landmarks when installing prefabricated elements, as well as deviations of the completed installation structures from the design position should not exceed the values ​​given in Table. 12. SNiP 3.03.01-87 "Bearing and enclosing structures."
In the process of installation, a measuring control should be carried out, a geodetic executive scheme should be drawn up. Results of control should be recorded in special journals.