Tower cranes explained: everything you need to know
Tower cranes are the backbone of modern construction, offering unrivalled lifting power and precision for large-scale projects.
If you’re a contractor in need of a reliable tower crane hire service or simply fascinated by these towering giants, we’re here to help!
From understanding how tower cranes work to their lifting technology and capabilities, keep reading to gain valuable insights into why tower cranes are essential for the construction industry.
What is a tower crane?
A tower crane is a tall, fixed crane used to lift and transport heavy materials on construction sites.
They are crucial for building high-rise structures, bridges, and infrastructure projects where standard cranes lack the required height and capacity.
With their ability to lift tonnes of material hundreds of feet into the air, tower cranes make seemingly impossible construction tasks a reality.
How is a tower crane erected?
Erecting a tower crane is a meticulous process involving multiple stages:
- Site preparation: The crane’s foundation is secured with a large concrete base to ensure stability.
- Mast assembly: The crane’s mast (vertical structure) is built in sections and bolted together.
- Slewing unit installation: The operator’s cab and machinery deck are installed at the top of the mast.
- Jib and counterweight addition: The long horizontal jib is attached, followed by counterweights to balance the crane.
- Climbing process: If required, the crane can ‘grow’ by adding sections to the mast using a climbing frame.
How are crane towers built?
Tower cranes are constructed using modular steel sections, which are transported to the site and assembled in a precise, step-by-step manner.
Once the base is anchored, each section is carefully lifted and bolted into place. This careful planning ensures the crane remains secure and stable, even when handling colossal weights at great heights.
To further enhance stability, reinforced connections and locking pins are used between sections, preventing any structural weaknesses.
Engineers also conduct regular safety inspections and load tests to ensure the crane can withstand extreme forces and harsh weather conditions, making them one of the safest lifting solutions in modern construction.
How much can tower cranes lift?
The lifting capacity of tower cranes depends on their design.
Generally, these cranes can lift between 10 to 20 tonnes, but some heavy-duty models handle much more. The closer a load is to the mast, the greater the weight it can lift.
At maximum reach, the capacity decreases, but thanks to counterbalancing and advanced load monitoring, tower cranes can safely move massive loads with ease.
How do tower cranes stay balanced?
Tower cranes use counterweights, a robust base, and accurate engineering to remain stable.
The counterweights on the opposite end of the jib help offset the weight of heavy loads, while the anchored mast keeps the structure from toppling.
Advanced sensors continuously monitor balance and wind conditions, ensuring safe operations at all times.
Do tower cranes swing in the wind?
Yes, and that’s by design!
When not in use, tower cranes are left in “weathervane mode,” allowing them to pivot with the wind.
This minimises strain on the structure and prevents dangerous resistance against strong gusts.
Built to withstand harsh weather conditions, tower cranes can operate safely even in high winds, ensuring projects stay on track.
Why choose BJW Crane Hire for tower crane services?
When it comes to tower crane hire, experience and reliability matter.
At BJW Crane Hire, we provide state-of-the-art mobile tower cranes, perfect for projects requiring efficiency, flexibility, and expert handling. With our experienced team and cutting-edge equipment, we guarantee:
- Rapid crane deployment to keep your project on schedule
- Industry-leading safety standards for peace of mind
- Expert crane operators with years of experience
- Competitive hire rates with no hidden costs
For more information about our crane hire services, contact our team today. We’re on hand to help and can answer your questions.
Either call us on 01724 289 501 or drop us an email at office@bjwcranes.co.uk and we’ll get back to you as soon as possible.