The first chapter strictly defined the scope of application of the standard, and pointed out that this standard applies to prefabricated shelves that use forklifts as the main storage tray unit goods, but does not include automatic storage warehouses with rail stacker cranes as the main storage tray unit goods. Use shelves.
The second chapter is "Normative References," which lists the names and codes of a large number of related technical standards referred to in this standard, making the standards traceable and authoritative, and conducive to the use of standards by users of standards. Content is queried based on the referenced file.
The third chapter regulates and explains the terminology of the components of the shelf. The main components such as the opposing columns, beams and other safety devices such as foot protection, rear gear, protective net, crash bar, gantry pull rod, etc., as well as parameters such as goods, cargo spaces, columns, rows, and column distances, were all made. Specification and interpretation. The definition of these parameters makes the communication and communication among shelves production companies, production companies and users more accurate and convenient.
Chapter IV specifies the form, grade and load of the shelves. The standard divides the form of the pallet shelf into two types: single-row and double-row. These two types of structures have fully met the user's requirements for use of pallet racks. Regarding the shelf level, it is classified according to the allowable deflection of the beam and divided into A and B categories. The clear definition of the rack load rating and maximum load, as well as the application of specific calculation methods, add another dimension to this standard, which is to provide designers and customers with methods for shelf design and safe use.
The fifth chapter is material. The material has a decisive influence on the quality of the shelf. Therefore, the standard accurately stipulates the three types of materials used for shelf production—structure materials, welding materials, and connector materials, and for the first time, the shelf load-bearing components for low-temperature environments. The material made clear requirements. On this basis, the standard also specifies the welding material at the same time, which makes the guidance of this standard more meaningful and the rigor of the standard is reflected here. The connection material is easily overlooked in the shelf product, and the standard also makes a request for it, which has the guiding significance for the shelf enterprise to regulate the rational use of the material.
The structure is the most important aspect of pallet racks distinguishing from other forms of shelves, and Chapter 6 makes this requirement. After many years of improvement, the pallet rack structure has gradually been formed, especially in the adjustment of the pitch and the foot connection. Most of the major domestic companies in the production of pallet racking adjustment pitch most of the use of 50mm, 75mm or 100mm, this standard was drafted in the early stages of extensive solicitation of domestic major production companies and representative of the use of the views of the majority of manufacturers With the approval of users, it can play a beneficial role in standardizing production of shelves.
The seventh chapter is the shelf size. The main contents include effective column spacing, effective layer spacing, depth, height above the plane of the uppermost beam, and allowable difference. These parameters are one of the highlights of this standard. It is a basic requirement that the shelf can achieve interchangeability after the implementation of standards. It is of great significance that some shelf members reach the final general degree. Its parameters are expressed in the form of formula calculations or tables, making it easier for users to read these terms and play a beneficial role in implementing the standards in a wider range. The shelf production enterprises are required to design and produce shelves in accordance with the requirements of this standard, which will certainly be conducive to large-scale production and interchangeability.
The strength, stiffness and stability requirements are the design basis for guaranteeing the shelf quality and safety. It is an important content of this standard and has been standardized in Chapter 8. This chapter puts specific requirements on the structure of the shelf and the size of the main components, the position of the force, and the stress, so that this standard is more instructive and practical at the shelf design stage. In this chapter, the horizontal force specification mainly complies with China's earthquake-related regulations. For example, the seismic fortification intensity level refers to GB50223-95 “Code for Seismic Design of Buildings” and GB50011-2001 “Code for Seismic Design of Buildings”. The references here provide some of the original basis for shelf design, allowing designers to understand the source of some of the design data while referring to this standard.
Spraying is a key process for shelf production, and Chapter 9 makes clear provisions for spray quality requirements. As the mainstream of the current shelf surface treatment method is powder electrostatic spraying, this chapter stipulates the electrostatic spraying operation method and quality requirements, especially the coating defects. At the end of this chapter, it also makes clear requirements for other coating processes.
Testing is a method to judge whether a product is qualified or not. The tenth chapter of the standard describes in detail the relevant detection methods for shelf products, which mainly include the detection of the deflection of the beam under vertical load, the detection of the displacement of the column and beam joint under horizontal load, and the paint. Membrane detection, detailed introduction and stipulation of operation steps and specific methods, and provisions for the method of value determination and determination of test results.
The content of chapter XI is inspection rules. The inspection is divided into two kinds: factory inspection and type inspection. This chapter separately specifies the factory inspection and type inspection, and fully explains the principles of the determination of when to inspect, how to inspect, and the inspection.
The contents of the twelfth chapter of the specification are the product identification of the pallet shelf. The method of identifying the product includes the shelf name or code name, structure type, grade, size parameters, and load capacity parameters.
The thirteenth chapter stipulates the placement of the display signs, the area of the signs, and the specific items that should be marked in the signage, which will help the users of the shelves and their safe use.
It should be pointed out that there are still some deficiencies in this standard. For example, the calculation part of the standard is still not standard enough, and it lacks the verification of the shelf inspection platform. There are not many scientific research institutions and related universities involved in the standard formulation process and there is not enough theory. Support, etc., will find problems during implementation so that they can be better improved in the future.