Modern urban landscapes would not be possible without the invention of the tower crane. Since 1949, when Hans Liebherr created the first tower crane, cities across the world have relied on the heavy lifting crane to make worksite projects quick, safe, and efficient.
In this tower cranes guide, we will explore the basics of how these important devices work. We’ll even answer a popular question: Why don’t the cranes fall down or tip over?
How Do Tower Cranes Work?
Tower cranes soar up to 265 feet into the air and can lift up to 20 tons. Regardless of their stature, tower cranes basically have the same three parts.
Keeping each tower crane from tipping over is a base that crews bold to the concrete below. Crews then connect the base to a mast or tower.
The slewing unit attaches to the base. The unit has a motor and ring gear. The gear allows the crane to rotate.
The working arm (jib) carries the load. A trolly runs along the long arm and moves the load. The operator uses counterweights to lift heavy loads up to where they need to be lifted.
Last but not least, the operating cab allows a trained professional to maneuver the massive crane in a delicate choreography.
How Are Tower Cranes Constructed?
Putting together a tower crane is hard work. First, construction project managers may need to explore a tower crane buying guide or search “tower cranes near me.”
Tower cranes keep from falling over because they are bolted to a large, concrete slab. This slab may need to be poured weeks before a tower crane can be set up.
A mobile crane helps move the sections. The crane then grows one mast at a time.
The crew attaches a top climber between the slewing unit and the upper end of the mast. A hydraulic ram then lifts the mast 20 feet at a time.
The process is slow work.
While all tower cranes consist of the same basic components, crane operators use specialized designs for certain types of projects. Luffing cranes, for example, can raise loads at an angle to reduce the slewing radius.
Derrick cranes fit on rooftops. They do not require tall masts. Traveling tower cranes move on rails that allow the cranes to move laterally.
Do I Need a Tower Crane?
If you are working on a project that requires lifting materials to very high heights then you will require a Hiab crane to complete your work.
Tower cranes can lift and set steel at every level of your project. They can be used to pour concrete or set panels in place. They also can help with the placement of electrical and mechanical systems.
For more great tower crane tips, be sure to follow our comprehensive blog.
Shop for All of Your Crane-Related Needs
Tower cranes shape our modern city landscapes. Setting up the massive cranes is delicate work that requires years of expertise.
If you are looking for one source to learn more about cranes, follow our educational articles that provide expert advice on rail cranes, crane safety, and more.
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