BIFMA X5.9-2019 is intended to provide a common basis for evaluating the safety, durability and structural performance of storage units. It provides test methods and performance requirements for freestanding, mobile, and wall-mounted storage units. Where a product may be covered by more than one ANSI/BIFMA standard, the manufacturer shall determine which standard provides most appropriate test conditions. This standard applies to products designed for use in commercial and institutional environments. Its application for other environments may not be appropriate; it is the responsibility of the user of this standard to determine its applicability to such environments. Note: Commercial product naming conventions may cause confusion regarding the applicability of this and other BIFMA standards. For example, a "credenza" is typically defined and tested in the BIFMA X5.5 Desk standard, however, some configurations of "credenzas" will appear to be storage products within the definition of this standard and may be appropriately tested by this standard. The manufacturer shall determine which standard provides most appropriate test conditions. This standard specifies test methods and acceptance levels to help ensure reasonable safety and performance independent of construction materials, manufacturing processes, mechanical designs, or aesthetic designs. These tests are not intended to assess a product that has been in use. The tests were developed with an estimated product life of ten years based on a single-shift usage. Product life will be affected by product use, care and maintenance, environment, and other factors: product compliance to this standard does not necessarily guarantee a ten-year product life. Products may perform longer than ten years with appropriate use and care. The acceptance levels herein are based on the actual field and test experience of BIFMA members. ISO 17025 requirements for measurement uncertainty do not apply to this standard.