Identification of the cause of the collapse of the shelf

shelves have been recognized by more and more people in the warehousing and logistics industry. Shelves account for a large proportion of the market demand space, which has led to a fierce competition in the market. The production process and raw materials are not standardized. The produced shelves have great differences in various aspects such as load-bearing quality. Therefore, how to prevent and avoid shelf collapse has become the most concerned issue for consumers.
When designing the shelf structure, factors such as usage requirements, equipment conditions, load properties, material supply and installation conditions should be comprehensively considered, and the structural form, structural measures and production materials should be reasonably selected to achieve technological advancement, economical rationality, safety and applicability, and ensure quality.
In cases of shelf collapse cause identification cases, Zhongke Testing can provide shelf collapse cause identification services.

1. Overloading: The weight of the goods is greater than the load-bearing capacity of the shelf. It may not have much impact in a short time, but long-term use will cause the shelf to collapse.
2. Irregular shelf design: When designing the shelf structure, factors such as actual use, equipment conditions, load properties, material supply, and installation conditions were not fully considered, causing the shelf to exceed the maximum load-bearing range during design.
3. Material quality: The quality of the shelves is not up to standard, causing the overall structure to be unstable and causing safety hazards, resulting in shelf accidents.
4. Irregular operation: Due to irregular operation, the forklift hit the shelf when picking up the goods, causing the cross beam to fall off and causing the shelf to collapse.

GB/T 30675-2014 Mezzanine shelf
GB/T 33454-2016 Storage shelf usage specifications
GB/T 28576-2012 Industrial shelf design calculation
GB/T 27924-2011 Industrial shelf specifications and rated loads
GB/T 41514-2022 Specification for safety and evaluation of steel structure shelves
GB/T 39681-2020 Specification for design of three-dimensional warehouse shelf system
GB/T 39830-2021 Specification for seismic design of three-dimensional warehouse steel structure shelves
GB/T 38493-2020 Sensory analysis Food Shelf Life Assessment (Evaluation and Determination)

A shelf collapsed in a steel factory and dozens of tons of goods fell, causing injuries to many employees. This incident attracted great attention from the steel mill. They believed that the cause of the accident was a quality problem with the shelf, and they communicated with the shelf supplier. However, the shelf supplier believes that there is no problem with the quality of the shelves. So both parties entrusted an appraisal agency to conduct appraisal.
identification and analysis results: The
identification and analysis expert team went to the site to survey the environment and found that the warehouse was relatively humid. Then check the fracture opening and other locations of the broken shelf, and find that there are continuous fractures at the safety pin socket, and some safety pins have signs of loosening. At this time, the expert team has a preliminary judgment on the cause of the collapse, but further confirmation requires careful laboratory testing.
Finally, based on the comprehensive test results, the expert group gave an appraisal opinion: The warehouse has high humidity, and if it has been in this environment for a long time, the shelves will be partially rusted and the strength will decrease. In addition, there are also parts between the safety pin and the socket that are not fastened enough, which is also the reason for the collapse of the shelf.
In addition, the expert group also noticed that the goods in the warehouse were placed relatively randomly, and some goods were stacked too high, causing the shelves to tilt and collapse, posing safety risks. The combination of these reasons led to this accident. The
expert group also proposed that warehouse shelves should be planned rationally, especially high-level shelves, to prevent overweight. At the same time, check the stability to prevent falling objects from high altitudes. Shelves should be checked regularly and old shelves should be replaced in time to avoid accidents.