Gantry Accessories

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Automated PLC-controlled synchronization of all movement
Display of lift extension by each lift housing
Display of travel distance for each lift housing
Display of load weight lifted by each lift housing
Overload warning
Override controls allow for operator adjustment of positions
System is Wireless via radio or cable-connected via CanBus pendant
The standard operator manual controls remain on the operating console of the Control Module; may be used for position adjustment, or in the event the Remote becomes inoperative

(U.S. Patent # 5,360,123)

Theory of Operation

The Stabilizer Bars are for increasing the stability of the gantry lift housings, particularly in the side-to-side direction. One end is connected to the horizontal lifting beam and the other end is connected to the top vertical boom section. Both ends have spherical bearings to allow for misalignment particularly in the travel direction. The two springs in the tube housing on each side of the rod piston resist changes of the length of bar connections in either compression or tension. At full compression the larger stabilizer bars have 8,000 pounds force and the smaller bars have 4,000 pounds force.

During operation, if the angle between the lifting beam and vertical boom changes from the initial setup, the springs will begin to try to maintain the original angle, usually 90 degrees. As the angle change increases, the spring force increases. A bolt that is attached to the spring piston protrudes through a slot in the spring tube that gives a visual indication if the angle between the boom and beam has changed. This force conservatively translates to a 2,000-pound horizontal force at the top of the boom that is assisting the boom to remain vertical.

The new and innovative SHARK- LINK gantry lift extension system (patents in application) was developed and field proven by HLI Consulting and is manufactured and marketed by J & R Engineering. HLI Consulting is known worldwide for their extensive rigging and specialized heavy lift engineering experience and for solving unique lifting challenges. They are available to all gantry users to assist in the implementation of the SHARK- LINK system or solve any other project challenges that may occur.

The SHARK- LINK system can be used instead of traditional strand jacks without the disadvantages and potential problems inherent in strand jacks.

INVESTMENT: Four Shark-Link assemblies are about 1/3 the cost of four strand jacks.

DURABILITY: The life span usage is indefinite. Strand jacks have complicated precision parts that require frequent servicing. The lifting cable and cable wedge collets require replacement after few uses, sometimes after only one lift.

SAFETY: The load is always under positive control. Strand jacks have had functional failures during a lift such as uneven cable loading, cable slippage or cylinder failures.

OPERATING: The Shark-Link’s uncomplicated design has obvious visual load attachment and sequencing. Strand jacks can require an expert technician and are usually computer controlled.

LOW HEAD ROOM: A strand jack system can require up to 12 feet more headroom height than the SHARK-LINK system.

LIFTING HEIGHT: The SHARK-LINK system can more than triple the lifting distance of any model hydraulic boom gantry.

Lift Equalizer

POWERLINKS

STABILIZER BARS

Boom Extensions

HYDRAULIC GANTRY LIFT EXTENSION SYSTEM 500 TON LIFT CAPACITY

Gantry Track

Powered Rotator Frame

Work Platforms