1. Enhance Rigidity: Back ribs increase the rigidity of the aluminum panel, making it more robust and stable. This is crucial for applications such as building facades to withstand external forces like wind pressure and self-weight.

2. Improve Wind Resistance: In regions with high wind loads or in tall buildings, aluminum panels need to possess a certain level of wind resistance. By adding back ribs, the wind resistance of the aluminum panel can be effectively improved.

3. Reduce Weight: The design of back ribs can also involve using lighter yet sturdy materials in the structure, reducing the overall weight of the aluminum panel without compromising strength.

4. Increase Stability: Back ribs contribute to maintaining the flatness and shape of the aluminum panel, preventing deformation or warping caused by external forces. This is crucial for ensuring a neat and consistent appearance of the building.

5. Facilitate Installation: The presence of back ribs provides more installation options, making it easier to connect the aluminum panel with the building structure and ensuring post-installation stability.

It's important to note that different manufacturers and designs may employ various back rib configurations depending on specific project requirements and design standards. When selecting aluminum panels, understanding the back rib structure, as well as the materials and processes used, is crucial to ensure compliance with project requirements and standards