30 m jib tower crane

Types of 30 m jib tower cranes

A 30 m jib tower crane is a kind of tower crane with a horizontal arm called a jib. There are different types of jib or tower cranes in general. The hammerhead crane is one of the most popular types of tower cranes, and it usually has a fixed jib that can swing from one side to another. The hammerhead crane is normally set at the top of the tower, and it has a team of operators that control the movements of the crane. The crane can move loads horizontally and vertically. This makes it very convenient for building structures with precision.

The second most popular type of jib crane is the luffing crane. Unlike the hammerhead crane, which uses fixed jibs, the luffing crane has jibs that can lift and lower by changing angles. This allows the crane to lift loads to higher positions. The luffing crane also has the ability to access areas that are very tight, which means that there are other buildings and structures that are close to the area where the luffing crane will be used. This makes it very ideal for construction projects that are near other structures or places.

The third type of jib tower crane is the flat-top crane. This type of crane does not have any obstructions on top. The flat-top crane has a simple and sleek design. It is easier to assemble and disassemble. The flat-top crane is also suitable for constructing high-rise buildings. Because of the open space on top, there won’t be anything that will obstruct the work area. This also allows the operators of the flat-top cranes to work more efficiently and safely.

Finally, the self-erecting crane is a type of jib tower crane that uses its own power to position itself vertically in an upright position once it is ready to be erected. It can also disassemble itself when it is ready to be transported. This makes it very efficient and easy to use.

Specification & Maintenance

• 30m Jib length:

  The jib length is the horizontal arm that extends outwards from the tower of the crane. For a tower crane with a 30-meter jib length, it can reach up to 30 meters from the vertical tower.

• Maximum load:

  Tower cranes can carry heavy loads in the construction of commercial buildings. A 30m tower crane can carry weights up to 2000 kg depending on its design and structure.

• Height:

  The height of a tower crane may vary, and in many instances, it is more than 60 m from the base to the top of the crane. The maximum height also depends on how many tower sections are used to construct the crane.

• The working radius:

  This refers to the distance the crane can operate from its center, extending outwards horizontally. The radius is calculated from the base or center of the crane to the point where it can safely lift and move materials.

• Rotational Speed:

  A 30m tower crane can rotate around its vertical axis at a speed of 2 to 6 rotations per hour. The speed depends on the design and system of the crane.

• Elevation System:

  Tower cranes use various systems for hoisting as in duplex, triplex, and other configurations for elevating weight and also the height of the crane.

It is crucial to carry out proper maintenance of tower cranes to keep them in good condition. The following tips for maintenance can ensure safety and efficiency.

• Routine inspections: Daily inspections with a checklist to confirm that all features are working fine along with weekly and monthly thorough inspections of crucial parts like the braking system, transmission, and others by a certified inspector according to the manufacturer's guidelines.
• Maintenance of components: Users should be aware of critical parts of the crane like the mast, slewing mechanism, jib, hoist, and brakes, among others, and follow the guidelines to keep them in good condition.
• Lubrication: Lubricate moving parts, including gears and chains, regularly to reduce wear and tear and to prevent any accidental breakdown.
• Load management: Avoid any kind of damage due to overload or risk of safety hazards by strictly following load limits as per the manufacturer's guideline.

Uses of 30 m jib tower crane

• High-rise buildings

  The main use of the 30 m tower crane is in the construction of tall structures and high-rise buildings. Its great height and lifting capacity make it a suitable tower crane model for constructing complex structures from great heights. The crane can be used to build the building's foundation, install structural components, and add finishing touches from the top down.

• Bridges

  Large span bridges, such as suspension and tower bridges, also require the use of the 30 m jib tower crane. The crane can assist in precasting bridge girders, erecting high bridge towers, and assembling other bridge components.

• Industrial facilities

  The 30 m tower crane can also be used in the construction of industrial facilities, such as power plants, factories, and refineries, and it can be used to install large equipment such as reactors, boilers, and turbines.

• Wind turbine erection

  The erection of large offshore and onshore wind turbines can be done with the assistance of a 30 m tower crane. The crane can help in assembling the turbine tower, nacelle, and rotor blades, as well as in positioning the completed turbine on its foundation.

• Mining operations

  In mining operations, a 30 m tower crane is used for the construction of infrastructure such as conveyor belts, crushing and screening plants, and processing facilities. It can also be employed in the assembly and maintenance of mining equipment.

• Renovation and restoration

  A 30 m crane tower can also be useful for renovation and restoration of tall buildings, historical landmarks, and churches. It aids in replacing structural components, restoring facades, and carrying out repair works at elevated heights.

How to choose a 30 m jib tower crane

Selecting a suitable 30 m tower crane with jib for construction projects may require research. Several factors will impact a business's decision about which type of crane to invest in for future projects.

• Projects completed: One key aspect to consider is the number of projects and types of projects the business usually takes on. If the business works mostly with large-scale construction, an extra-large, high-capacity, and height-climbing crane will be required. On the other hand, if only small to medium-sized projects are typical, then a 30 m crane should suffice.
• Cranes used in the past: Consider the types and models of cranes previously utilized. If the current crane model has worked well, there may not be the need to change to a different model. Nonetheless, it may be worth considering newer models with recent technological improvements that increase safety and efficiency.
• Operator ability: The skills and qualifications of crane operators also impact suitable crane selection. If operators are already trained and experienced in a specific model, then investing in the same type may be more cost-effective. However, if there are plans to train new operators soon, selecting a crane with user-friendly features and comprehensive training manuals may be necessary.
• Budget constraints: Of course, budget considerations also play a significant role in this decision-making process. Cranes with larger capacities and more advanced features typically come at a higher purchase or rental cost. It is essential to balance upfront costs with potential returns on investment in terms of efficiency and productivity.
• Supplier reliability: An equipment supplier's reputation can also influence the final choice of tower crane. Businesses must research suppliers who provide reliable after-sales service, prompt delivery, and well-maintained equipment.

Q&A

Q1: What determines how high a crane can be jacked?

A1: The height of a crane that needs jacking will be determined by the following factors:

• The maximum height that the crane can attain as per the design specifications.
• The availability of sufficient ballast materials to ensure stability at that height.
The capacity of the crane's lifting mechanisms and the jacking system to handle the required ballast and weights.
• The absence of environmental constraints, such as wind speed, that could limit the safe jacking height.

Q2: Where does the power come from to operate a tower crane?

A2: A tower crane's power requirements are typically met through the following means:

• An external power source supplied through a cable connected to the grid or other electrical sources.
• An internal generator that can produce the required power.

Q3: What are the main parts of a tower crane?

A3: A tower crane consists of the following major components:

• The counterweight that ensures stability during operations.
• The horizontal jib that carries the load and is rotated to position the load as needed.
The mast or vertical tower that supports the crane and provides a structure for lifting operations. The lifting mechanism, including the hoist and trolley, that performs the actual lifting and moving of loads.

Q4: How long does it take to erect a tower crane?

A4: The time required for erecting a crane may vary depending on factors such as the size of the crane, the crew's experience, and the site's conditions. However, as a general guideline, it can take anywhere between 1 to 3 days to erect a tower crane.