1. The rack installation should be constructed according to the drawings. When there is any inconsistency between the site and the design during construction, it should be proposed in time, and construction can only be carried out after the change is approved.

2. The various measuring and testing instruments, which is used in the installation of shelves need to comply with the provisions of the current national metrological regulations, and the accuracy level shall not be lower than the accuracy level required by the installation.

3. The concealed works before the installation of the shelves should be inspected before the concealed works, and the construction can be continued only after they are qualified.

4. Self-inspection should be carried out during the installation of shelves.