Finger Expansion Joint

The comb plate expansion joint (SF type) is composed of interlocking comb-shaped steel plates, stainless steel sliding plates, rubber waterproof layers and high-strength anchoring systems. Its design fully utilizes the high strength and wear resistance of steel, directly bearing the wheel load, demonstrating extremely strong impact resistance and fatigue resistance. The sliding contact between the stainless steel plates and the comb teeth ensures smooth expansion, capable of accommodating multi-directional displacement and rotation. This structure has a large expansion range, wide application scope, and the gaps between the comb teeth effectively drain water and prevent blockage, and the waterproof layer design prevents water erosion of the beam body. The product has a thin and lightweight shape, smoothly connecting with the bridge deck pavement, and provides a smooth ride without bumps. Compared to traditional models, the comb plate expansion joint is more suitable for steel structures bridges with extremely high requirements for comfort, durability and maintenance convenience, such as steel bridges, curved and sloping bridges, and urban overpasses.