- Describe crawler crane characteristics and their advantages
- Compare all-terrain and rough terrain crane types
- Identify power line safety requirements and safe distances
- List pre-operation inspection items and regulatory compliance requirements
Lesson 1
Crawler Cranes & Their Advantages
What Is a Crawler Crane?
A crawler crane is a mobile crane mounted on tracked undercarriages (crawlers) instead of wheels. The tracks distribute the crane's weight over a large area, providing excellent ground bearing pressure and stability.
Tracks
Undercarriage Type
360°
Full Rotation Capability
Low PSI
Ground Bearing Pressure
Advantages of Crawler Cranes
| Advantage | Description |
|---|---|
| Ground pressure | Tracks distribute weight over large area |
| No outriggers | Self-stable on tracks (reduced setup time) |
| Pick-and-carry | Can travel with loads (within limits) |
| Rough ground | Handles uneven terrain better than wheeled cranes |
| Stability | Wide track base provides excellent stability |
Limitations
- Slow travel speed - typically 1-2 km/h maximum
- Cannot travel on public roads - must be transported on trailers
- Ground damage - tracks can damage surfaces (asphalt, concrete)
- Assembly time - larger crawlers require significant setup/teardown
- Lattice boom - most crawler cranes use lattice booms requiring on-site assembly
Key Advantage
The main advantage of a crawler crane is stability without outriggers and the ability to pick-and-carry loads while traveling. Tracks distribute weight for lower ground bearing pressure.
Key Takeaway
Crawler cranes use tracks for excellent stability without outriggers and can pick-and-carry loads. They offer low ground bearing pressure but are slow, cannot travel on public roads, and require transport by trailer.