A columbarium is a dedicated unit designed to store cremation urns, and its manufacturing must adhere to specific standards. The following guidelines outline the key production criteria for columbarium units covering material selection, structural design, dimensional specifications, safety features, aesthetic design, identification markings, installation requirements, and environmental considerations.

1. Material Selection
   High-quality materials such as stainless steel or cold-rolled steel plates should be used in the production of columbarium units. These materials offer strong corrosion resistance and durability, ensuring long-term structural integrity. All materials must comply with relevant national standards.

2. Structural Design
   The structure should be simple, functional, and easy to clean and maintain. It must provide secure and stable placement for urns, with sufficient support and protection. Proper ventilation openings should also be incorporated to ensure adequate airflow.

3. Dimensions
   Dimensions should be determined based on practical needs. Generally, the length of a Columbarium unit should be no less than 1000 mm, the width no less than 500 mm, and the height no less than 1800 mm. Multiple niches should be provided to accommodate varying user requirements.

4. Safety
   Safety is a critical factor. The design must ensure urn stability and prevent accidental displacement. Anti-slip features, safety handrails, and other protective elements should be included. The structure must be capable of supporting a load of no less than 1000 kg.

5. Aesthetic Design
   The appearance should be simple, elegant, and dignified, contributing to a solemn and respectful atmosphere. The design must harmonize with the surrounding environment. Color schemes should generally be in cool tones to maintain consistency with the setting.

6. Identification Plates
   Each unit must include a clearly visible identification plate displaying the deceased's name and dates of birth and death. Inscriptions should be legible and concise. The placement of plates should allow for easy identification and viewing.

7. Installation Requirements
   Installation must be carried out by professionals. Placement should consider lighting, ventilation, and sightlines. During installation, care should be taken to avoid damaging or scratching surfaces. After installation, a full inspection and adjustment should be conducted to ensure compliance with standards.

8. Environmental Considerations
   Eco-friendly materials, such as recyclable and formaldehyde-free options, should be used. Manufacturing processes should minimize environmental pollution and resource consumption. The design should also facilitate future recycling and reuse to support sustainable resource use.

In summary, the production of a Columbarium unit must take into account all the above aspects—materials, structure, dimensions, safety, aesthetics, identification, installation, and environmental impact. Only by adhering to these standards can we ensure that the product meets user needs and honors the memory of the departed with respect and care.