Energy-saving, lightweight, high-strength, corrosion-resistant. Principles of material mechanics. Convex-concave corrugated structure enhances mechanical strength, reduces steel plate thickness, and decreases self-weight. Superior heat dissipation performance, achieving energy efficiency. Designed with a structure for upper and lower cold and hot air exchange, combined with an overall increased heat dissipation surface, it maximizes the dissipation of heat generated by the conductive cables inside the bridge, reduces the resistance and loss of electrical circuits, improves electrical energy utilization, and achieves energy-saving effects. Compared to ordinary trays, the energy-saving tray achieves an electricity saving rate of 2.05%, and compared to ordinary ladder frames, the electricity saving rate is 0.95%.