When the slide is mounted on the shelf, it should be guaranteed to have a certain slope, and the tray can be moved in heavy duty. The slide is too small and the tray will slide or slide. The incline is too big and the tray is falling too fast, causing a crash or tipping. In addition, the size of the slope also depends on the material of the bottom of the tray, which is generally recommended to be 3.5 to 3.0% for wooden pallets. For plastic pallets, it is 2.5% ~ 2.0%. The steel tray is recommended for 2.0% ~ 1.5%. In the design of the actual warehouse, the best choice of the slope should be determined after the detailed calculation.