Welded Rail Clip for P43 Crane Rails

Welded rail clips for P43 crane rails (specifically the TG43 or WJK-TG43 series) provide a more rigid and stable fastening solution than standard bolted clamps by eliminating the need for through-drilling in crane beams. This "welded-bolted hybrid" design uses a base component welded directly to the steel support, while the upper cap secures the rail via high-strength bolts.

TG43 Welded Rail Clip Specifications

The TG43 series is the primary standard for P43 rails, offering different performance tiers based on material and installation height. 

Feature Ordinary Type (Q235) Enhanced Type (Q345)

Lateral Load Capacity ~45 kN per wheel ~55 kN per wheel

Bolt Grade Grade C Grade 8.8 High-Strength

Standard Installation Height 85 mm 85 mm

Reduced Height Variant — 71 mm

Key Features of Welded P43 Clips

Wedge-Adjustable Alignment: Features a wedge structure that allows for precise lateral gauge adjustment during installation to ensure smooth crane movement.

Active Contact Technology: Many modern clips, such as those from Gantrex, use a self-locking wedge design that keeps bolts in tension even under high lateral forces.

Vibration Absorption: Typically used with elastic composite rubber pads to eliminate the "curved bow wave" effect and reduce structural fatigue.

Installation Spacing: Standard spacing is generally 600 mm for cranes under 275 tons, and 500 mm for heavier applications. 

Comparison: Welded Clips vs. Bolted Clips for P43 Rails

While you previously asked about GDGL bolted clamps, welded clips like the TG43 offer distinct advantages for permanent installations. 

Structural Integrity: Welded clips do not weaken the upper flange of the crane beam since no drilling is required.

Load Distribution: The welded base transfers horizontal forces more smoothly into the braking system of the crane beam.

Maintenance: They require significantly less maintenance because there are fewer mechanical fasteners to loosen over time.

Accessibility: Unlike bolted clamps, welded clips are installed entirely from the top, meaning you do not need access to the underside of the girder. 

Signum Rail Fastening is able to offer rail clamps(rail clips) according to the client’s requirements.

Contact us now to get a quote.