Episode 11 · Construction engineering · 2 min 23 sec
How Tower Cranes Are Built, Climb and Come Down
How a tower crane is assembled, climbs with a skyscraper and comes down again—with hydraulic climbing frames and smaller dismantling derricks.
The complete story · One short film
Above the skyline.
One section at a time.
- Assemble the crane on an engineered support
- Add mast sections with a hydraulic climbing system
- Plan removal, including how the final machine leaves
AI-generated presenter and conceptual scenes. Educational explanation, not operating instructions.
Watch on YouTubeExplore the explanationThe key idea
Built to rise. Planned to leave.
A tower crane arrives in components. On a crane equipped for top climbing, a hydraulic climbing frame raises the upper assembly to make space for another mast section. Removal depends on the site: the crane may climb down, or a rooftop derrick may dismantle it. A suitable final derrick can be broken into transportable pieces.
Follow the evidence
It begins on the ground
A mobile crane can place the initial mast sections, slewing assembly and jib. Counterweights oppose part of the load moment, but stability also depends on the tower, connections and engineered support. The film illustrates the idea; the actual assembly sequence is specific to the crane.
References belowThe frame that makes room
In the illustrated top-climbing arrangement, hydraulics raise the crane’s upper assembly relative to the existing mast. The frame supports and guides this movement, allowing a new section to enter. Once connected, the taller mast carries the upper assembly. This is a simplified explanation, not a climbing procedure.
References belowTwo ways to climb
Top climbing adds mast sections. Internal climbing can instead move the crane and its mast upward through supports inside the building. Engineered building ties or climbing collars provide support where required; these systems are not interchangeable.
References belowHow the last crane leaves
Some cranes descend before a mobile crane dismantles the remainder; others need a rooftop derrick. Liebherr documents a Montreal project where a derrick dismantled the larger crane and then left by goods elevator in components. This works only when component size, mass and the transport route permit it.
References belowWhat the film leaves simplified
Supports, ties, balance, wind limits and each temporary load path require project-specific planning and manufacturer procedures. OSHA’s US tower-crane requirements provide one regulatory reference, not a substitute for the rules applicable to a particular site. AI-generated scenes are illustrative, not measurements or a validated simulation.
References belowThe questions behind the crane
Does the giant tower crane fit in an elevator?
The film refers to dismantled components of the final, smaller derrick. It does not mean the full tower crane travels in an elevator.
Does every tower crane add sections to climb?
No. The episode shows top climbing. Internal climbing can raise a crane through the building without continuously extending a mast from ground level.
Do counterweights alone keep it standing?
No. Stability depends on the complete load path and support arrangement, including the foundation or building supports and any required ties.
Follow the evidence.
Primary manufacturer documentation and a regulatory reference. Source-specific crane details are examples, not universal specifications.
- OSHA — Tower cranes: erection, climbing, supports and dismantling (US regulation)
- Liebherr — EC-H / EC-B modular cranes: assembly and hydraulic climbing (PDF)
- Liebherr — Tower systems: building ties and internal climbing
- Liebherr — 200 DR 5/10 Litronic dismantling derrick
- Liebherr — Montreal job report: dismantling a crane and removing the derrick by goods elevator (PDF)
Published by MAKESTEAD · October 16, 2026 · Our sources and editorial approach