Box Girder Gantry Crane for Precast Concrete Yard & Plant

Box girder gantry cranes installed in precast concrete yard plant for handling concrete pipes, wall panels, core slabs, rail sleepers, to concrete poles, etc. Tailored design available.

Cranes for Precast Concrete Plant

Material handling cranes are vital for precast concrete plants for precast products handling to improve efficiency and safety. From concrete pipes, wall panels, core slabs, rail sleepers, to concrete poles and other precast products are all very large and heavy , which specifically designed gantry cranes are required to meet the particular material handling conditions and requirements.

Precast Yard Cranes can not only lift the precast beam with two sets of cranes, but also can lift the precast beam with a single crane with double spreaders. It is mainly used to lift the precast beam from the beam making platform to the beam storage position.

Precast gantry crane has two types, one is Box girder double girder gantry crane, which has the work duty from A3 to A8, the other one is engineering gantry crane, which has the work duty A3 to A5. Engineering gantry crane is cost-effective, which solution is more suitable depends on the situation on site and the customer needs.

Types of cranes for precast yard, typically gantry cranes and overhead cranes.

Precast Yard Cranes are able to lift a precast beam using a single gantry crane, equipped with double spreaders or it can be two sets of gantry cranes. They are frequently used to handle the long and heavy precast concrete beam from the manufacturing platform to the beam storage position.

Precast gantry cranes come in two varieties: box girder gantry cranes, which can handle work loads ranging from A3 to A8, and engineering truss girder gantry cranes, which can handle loads ranging from A3 to A5, with high wind resistance.

Yuantai can provide better precast yard crane solution to streamline your precast concrete manufacturing lines.

Box girder gantry crane for precast concrete plant

Casting yard gantry crane is widely used in casting yard of railway and bridge construction. This gantry crane performances mainly during concrete girders' fabrication and transportation. Considering casting yard is usually in open site and has a large area, crane dimension and power supply should be taken into consideration. In following cases, we will explain in details in order to give you a general pics.

Gantry cranes for casting yards are frequently employed in the construction of bridges and railroads. This box girder gantry crane works mostly during the construction and transporting of concrete girders. Crane size and power supply should be considered because casting yards are typically located on big, open sites. Tailored gantry crane design for your precast yard are available. Please feel free to contact us to get your free consultation.

Box girder gantry cranes

With a specific spreader, box girder gantry cranes are employed for lifting beams in precasting plants, moving and erecting bridges, and other tasks. Installation and disassembly are more feasible and affordable than that of the general use gantry cranes.

Main specifications of box girder gantry crane for precast yard use

Capacity of gantry crane : 20t-500t
Span length of box girder gantry crane : 24-55m
Lifting height of goliath crane : 9m-60m
Work duty of precast yard crane : A3
Raged voltage: 220V~690V, 50-60Hz, 3ph AC
Work environment temperature: -25℃～+40℃, relative humidity ≤85%
Crane control mode: Cabin control

Precast yard use gantry cranes are designed and constructed in compliance with national and industry standards like GB/T14406 "General Gantry Crane" and GB/T3811 "Crane Design Specification." It is appropriate for applications like highways, beam yards for bridges, and bridge construction. The retrieving tools can be pin-type moveable pulleys, spreaders, or hooks. The A type gantry crane frame has a rigid leg and flexible leg support structure, increasing total flexibility and enhancing carrying capacity.

Main structure and components of box girder gantry crane for precast concrete plant

The steel structure, the trolley, the crane-traveling mechanism, the electrical system, and other components make up the box girder gantry crane.

Steel structure gantry frame of box girder type gantry crane

The gantry frame steel structure of the precast yard crane is made up of main beams, support legs, connecting frames, connecting beams, trolley running rails, walking platforms, railings, ladders, and other auxiliary metal structures. The support legs can de designed with rigid legs and flexible legs accordingly.

The main beam, the ground beam, the support legs and the connecting frame are connected together by high-strength bolts and pins.

Main hoisting trolley of precast gantry crane

The hoisting mechanism , the trolley frame, and the trolley running mechanism are the main components. The JM electric winch is made up of the motor, the coupling, the brake, the reducer, and the drum, all of which are mounted on the frame.

The trolley frame is a welded-together structure of plate and section steel with sufficient strength and rigidity to ensure that the trolley frame does not interfere with the normal operation of each mechanism after being deformed under load. The trolley has a rain cover that is sealed and has lighting measures.

Auxiliary lifting mechanism of gantry crane

An electric hoist (as a secondary lifting mechanism) can be used for small lifting if required by the customer.

Trolley system of the gantry crane

The motor, reducer, wheel set, and other components make up the trolley system of the gantry crane. The low-speed end of the reducer is directly coupled to the wheel driving shaft (or is connected by a coupling). This structure makes it easy to assemble, maintain, and disassemble the wheel device.

The entire crane driving system is easy to install and maintain, has a low noise level, a generous appearance, and a basic structure.

Wheel set for box girder gantry crane

The gantry crane wheels are made of ZG340-640 wheel material, have heat-treated treads, a hardness range of HB330-380, a minimum quenching depth of 20mm for crane wheels, a minimum quenching depth of 15mm for trolley wheels, and a minimum hardness at the minimum quenching depth of HB260. An angle box wheel set is used. The crane wheels are double-rim wheels for cranes and single-rim wheels for trolleys.

Safety protection device of precast yard crane

Rail clamps, anchoring devices, buffers, and rail sweepers are all equipped on the box girder gantry crane for the precast concrete yard application.

The main circuit breaker, main power contact, and overcurrent protection make up the power distribution system. Other protective devices include short-circuit, over-current, loss of voltage, zero, ascending limit, travel limit, overload load limiter, emergency power-off protection, trolley sound and light alarms, and electrical interlock protection devices.

Trolley power supply and trolley feed mode

Crane power supply: trolley wire or cable drum; Trolley conductive: mobile cable trolley.

Platform, ladder

Wherever operation, inspection, and maintenance are required and there is adequate working area, ladders, platforms, and walkways are supplied that are safe and reliable. Steel pipes and angle steels are bent to create the ladder and platform. The platform has steel plates with non-slip patterns covering it, and a protective plate is attached to the bottom.

Driver's cab are optional for gantry crane operation

It stands on rigid gantry supporting legs. The operator operates the gantry crane from the driver's cab, which serves as their workspace. It uses a driver's cab that is locked off. The layout of the driver's interior fully reflects humanity and satisfies the needs of the demander. Its structural type design not only takes into account various functional requirements, sturdiness, durability, safety, and reliability, but also takes into account a good view, comfortable, and beautiful.

Featured projects of 50 ton + 50 ton gantry crane for precast yard handling

For the supply and installation of a precast concrete yard gantry crane for handling extremely big concrete beams and blocks in their working yard, our client was searching for a dependable partner.

The construction companies believe that casting the beams close to the sites will be more cost-effective. This will cut down on downtime and freight costs. The technical sales team at our company created a gantry crane with two 50-ton tandem hoists that operate by radio remote control.In this manner, the two hoists can operate jointly to move the concrete girders and separately if necessary.

Along with the two girder gantries, an air-conditioned operator cabin fixed to the crane was also provided to enable for comfortable operation and proper vision from the operator's seat. This allows the operator to control everything from his work station without putting himself in danger.

Tailored s pecification of precast yard gantry cranes