Gantrex Boom Hinge

Short Rail Solution

New Patented Short Rail Design Consisting of a “Flexible Web”

Consists of:

High quality synthetic rubber permanently vulcanized to the steel web

Rail head = same steel grade as the rail

Rail base = weldable steel

SPECIFICATION OF THE PRODUCT

Contact GANTREX for other rail shapes and load conditions

COMPONENT

MATERIAL Rail Head Support Elastomer

Same grade as rail steel Weldable Steel S355 According to EN

10025-2

High Quality Synthetic Rubber

Vulcanized to the Steel Parts

Rail Type (example) Typical Loads Short Rail Length Short Rail Foot Width Estimated Weight

A100 (DIN 536)

Vertical 400 kN;

(90 kips)

Horizontal 100 kN

(22.5 kips)

2 to 3 meters

(6.5-10 ft)

200 mm

(7.87")

200 kg each element (440#)

Horizontal 100 kN (22.5 kips)

(4 elements per crane)

GANTREX S.A. – rue du Commerce 19 – 1400 Nivelles - Belgium www.gantrex.be

Cornman Hinge Joints Problems

Discontinuous Rail Joint

Subject to:

High Duty Cycles

High Impact Loads due to:

Rail Joint Battering

Rail Plastic Deformation

Structural Damage

Rail Longitudinal Movements

Advantages of Silent Rail:

GANTREX S.A. – rue du Commerce 19 – 1400 Nivelles - Belgium www.gantrex.be

Features Benefits

• Increased Lifetime • Reduces local stresses in the same way as the Gantrex® pad: • Reduces the stresses in the support, reducing fatigue, and protects the wear

plates under the short rails; • Reduces rail head wear, especially at the rail joints; • Tends to center the wheel load; • Mitigates the effects of shocks due to misalignments at the boom, reducing

damages to the short rail;

• Reduced Maintenance • Reduces the transmission of vibrations from the trolley to the crane structure and consequently a reduction of problems with the fixing system, screw un-lightening of clamps, fatigue failure of welds, fatigue cracks in machined rail flanges…;

• After an initial implementation, replacement becomes a much simpler operation, reducing the downtime of the crane;

• Prevents excessive wheel wear and damage to the transmission components of the trolley;

• Improved Operating Efficiency

• Improves driving comfort by reducing in the cab the incidence of defects associated with premature aging of short rails.