Electromech Engineers' Goliath / Gantry Cranes

Such cranes are used at -

1. Construction sites
2. Ports and harbors
3. Workshops where existing columns cannot bear the wheel loads of a bridge crane
4. Workshops with low roof tie height that might restrict the height of lift of a regular bridge crane
5. Locations where bay lengths are excessive
6. Locations where bay lengths do not remain constant
7. Sites / projects where crane itself needs to be relocated from one place to another
8. Locations where loads are to be shifted from points outside the crane span as in the case of an overhang on either side of the rails

A Goliath/Gantry Crane is typically more expensive than an equivalent EOT Bridge Crane. However in almost all the relevant cases as mentioned above, a cost analysis shows that it is cheaper to go in for a Goliath / Gantry Crane as against a Bridge Crane. The cost analysis can be done by taking into consideration the following - 

• Cost of Gantry Girders that are required in case of a Bridge Crane
• Cost of Columns required for supporting the above Gantry Girders
• Difference in costs of civil foundation for columns (for Bridge Cranes) versus civil foundation for gantry rails (in Goliath / Gantry Cranes)
• Difference in Down Shop Leads cost of Bridge Crane versus Cable Reeling Drum and Cable Cost for a Goliath / Gantry Crane

Goliath / Gantry Cranes can be either of the Single Girder type or Double Girder type.

If required, Electromech Engineers can advise end users of the type of crane to be installed based on a cost benefit analysis.

Range of Specifications -

Safe Working Load	5000 kg to 75,000 kg
Spans	6 m to 40 m
Heights of Lift	As per customer specifications.
Class of Duty / Standards	Class 2, Class 3, Class 4 as per IS 3177 / IS 807. Also available as per FEM, DIN, BS or any other applicable international standards.
Speeds	Selected depending on client specifications / applications / shed dimensions
Crane Control	From floor through Pendant Push Buttons Open Cabin / Totally Enclosed Cabin Radio Control
Drive System	Twin Drive with Squirrel Cage / Slip Ring Induction Motors, through totally enclosed, oil immersed, helical gearbox.
Motors	Foot mounted, IEC Frame Size, Crane Duty motors for Main Hoisting, Auxiliary Hoisting, Cross Travel and Long Travel.
Brakes	Electro Hydraulic Thrusters for all motions. DC/AC Electro Magnetic Brakes or additional brakes can be provided on request.
Power Supply System	To Hoist and Cross Travel through Trailing Cables To Crane through Cable Reeling Drum or any alternate system.

• Optimum design ensuring minimum Dead Weight, Wheel Loads, Head Rooms and Clearances, reducing building costs.
• Forged runner wheels on Spherical Roller Bearings, resulting in long trouble free service.
• Hobbed and Run-In Heat Treated Gears machined from High Carbon Steel / Alloy Steels to ensure smooth, silent and durable service.
• Wide range of Heights of Lift, Hoisting, Cross & Long Travel Speeds to suit every operational requirement.
• Amply proportioned Main Girders and Legs of Box section, fabricated from IS 2062 plates that have undergone rigorous quality testing. All butt welds are 100% radiographed. Main Girders and Legs further stiffened with long and short diaphragms.
• End Carriages are made either from rolled sections or fabricated from plates.
• 2 Legs are of flexible design while the opposite 2 Legs are of rigid design. Flexible Legs are joined to the Main Girders through hinged joints.
• All Legs are braced.
• Well proportioned Live Axle Type Runner Wheels on "L" type bearing housings.
• Rope Drum fabricated from seamless pipes (ASTM A-106 Grade B) or from IS 2062 plates. The Rope Drum is stress relieved and the long seams are 100% radiographed.
• Standardized sub-assemblies used for complete range ensures quick supply of spares in case of emergencies or routine maintenance.