4. Foundations

All types of foundations must be factory-made and presented to the Employer for approval.

The Employer shall ensure the delivery of foundation blocks from the factory to the storage or the place of installation.

Before installation of foundations Contractor shall make covered-up works report in accordance with requirements DBNA.3.1-5-2009 «Arrangement of construction production».

5. Covered-up works and covered-up works reports

The erection works for over ground structures shall commence only after arrangement of the underground structures, soil backfilling in pits cavities, trenches and site layout.

Covered-up works are subject to inspection with issue of covered-up works reports in accordance to DBN A.3.1 -5-2009 “Arrangement of construction production”.

6. Erection works

At the site where assembly work shall be performed, performance of other works and presence of strangers are not allowed.

Methods of slinging of structures and equipment elements shall ensure their delivery to the installation site, in the position corresponding to installation.

Cleaning from dirt and ice of structural elements subject to installation, shall be made prior to their lifting.

Slinging of structures and equipment shall be made by the load-handling devices, which meet there equirements of GOST 24259-80 "Installation accessories for temporary fastening and alignment of building structures".

The elements of assembled structures or equipment during transportation shall be held from swayingand rotating by means of flexible guy lines.

When moving structures or equipment, the distance between them and projecting parts of assembled equipment or other structures shall be not less than 1 m horizontally, and 0.5 m vertically.

The angles of deviation from the vertical of the load ropes and polyspasts of load-lifting facilities(mechanisms) during installation shall not exceed the value specified in the technical requirements for this load-lifting mechanism.

Removal of slings from structure and equipment elements installed in the design position shall bedone after their permanent or temporary safe fastening.

Before performance of installation works, it is necessary to determine the procedure of exchange of prearranged signals between a supervisor and load-lifting mechanism's operator.

Assembly of structures shall be done only using parts and components that have been cleared from burrs, dirt, oil, rust, moisture, ice and snow. During assembly, change of design of parts and structures is not allowed.

Designed fastening of structures with bolted erection joints shall be implemented right after instrumental verification of position accuracy and alignment of structures.

All mounting holes shall be made according to the design diameter and only at the metal ware factory, with the exception of holes specified by the installation technology.

Structures with welded field connection shall be fastened in two stages, temporarily for the first time, and then as per the design.