Cable bridge and cross arm use solid cross-section structures, achieving long spans, even ultra-long spans without support. The selected anti-corrosion materials offer excellent corrosion resistance, preventing strong corrosion from various mediums, with high flame retardancy and an oxygen index over 40%. They can be widely used in highly corrosive environments, provide static shielding, resist aging without fading, and can be used outdoors for over 50 years.