What are the types of Subway Fasteners System

In metro track structures, the rail fastening system is a critical component that connects the rail to the sleeper or track bed. Its main functions are to secure the rail, ensure track gauge accuracy, absorb vibration and impact, and enhance overall track stability.

Depending on the track structure and design requirements, Subway Fasteners System can be classified into several types.

Based on the elastic mechanism, they are divided into indirect spring fastening systems and direct spring fastening systems.

• The indirect spring type transfers the clamping force to the sleeper or pad through spring rods or elastic components, such as the DTVI‑2 series, which is suitable for shoulderless sleeper designs and offers a wide range of gauge adjustment.

• The direct spring type integrates the elastic function into the rail clip itself, allowing the rail to bear force directly. This simpler structure is suitable for integrated sleeper systems.

According to rail profile and load requirements, commonly used fastening systems include the DTⅢ/DTⅣ series, designed for 60 kg/m or 50 kg/m rails and widely applied in metro and urban transit systems.

• The DJK5‑1 fastening system is specifically designed for metro applications, including rail clips, bolts, base plates, and elastic pads, meeting high seismic and sound insulation requirements.

• The DTIV‑1 system is suitable for 50 kg/m rails, providing flexible gauge adjustment for light-load metro lines.

A metro rail fastening system consists of multiple key components, including rail clips, elastic pads (rail pads / gauge pads), base plates, under sleeper pads, bolts and nuts, plastic positioning pins, and gauge blocks. These components work together to ensure the safety and smooth operation of the track.

GNEE RAIL has long provided a full range of high-quality metro fastening system products, as well as other types of railway fastening systems, including SKL rail fasteners system, KPO rail clamp fastening system, and Nabla railway clamp fastening system. If you are looking for a professional and reliable metro fastening system solution, please contact the GNEE RAIL expert team for technical consultation and quotation.