This document specifies the terms and definitions, product categories, basic requirements, technical requirements, test methods, inspection rules, signs, instructions for use, packaging, transportation, storage and quality commitments of multi-layer metal mesh indoor storage racks. This document applies to structures or components mainly composed of metal mesh made by cutting and stretching steel plates, pipes, plates, wire rods and other profiles, supplemented with auxiliary materials such as plastics, or made entirely of metal materials , a multi-layer metal mesh indoor storage rack with a load capacity of no more than 5 kg per square decimeter.