Liebherr 81k Self-Erecting Crane
The Liebherr 81k is a versatile self-erecting tower crane designed for efficiency and rapid deployment on construction sites. With its 45-meter jib length and maximum lifting capacity of 6,000 kg, it's ideal for residential and commercial construction projects.
Technical Specifications
- Max. Lifting Capacity:6,000 kg
- Max. Jib Length:45 meters
- Max. Hook Height:40.4 meters
- Max. Radius:45 meters
- Tower Height:21.3 - 26.0 meters
- Power Supply:400V / 32A
- Self-Erection Time:~20 minutes
Transport Dimensions
- Length:15.3 meters
- Width:2.5 meters
- Height:3.9 meters
- Total Weight:24,800 kg
Key Features
Quick Assembly
Efficient self-erection system without requiring an auxiliary crane, reducing setup time to approximately 20 minutes.
Compact Transport
Optimized dimensions of 15.3 × 2.5 × 3.9 meters for versatile site access, even in confined urban areas.
Variable Configurations
Adjustable jib configurations including 30° angle, providing enhanced vertical reach up to 40.4 meters.
Remote Operation
Comprehensive remote control system with integrated safety features for precise and secure operation.
Energy Efficiency
Advanced electric drive system optimized for reduced power consumption while maintaining high performance.
Adaptable Performance
Multiple operational modes with Load-Plus and LM1 configurations to adapt to different lifting requirements.
Applications
Residential Construction
Perfect for single-family homes, townhouses, and multi-family residential buildings up to 4-5 stories. Its compact footprint and easy setup make it ideal for urban settings.
Commercial Projects
Efficiently handles small to medium commercial buildings, retail centers, and office complexes. The adjustable jib angle allows operation in height-restricted areas.
Infrastructure Work
Supports bridge construction, small civil engineering projects, and municipal installations. The Load-Plus configuration enhances lifting capability for heavier materials.
Load Capacity Tables
These tables provide detailed information about the Liebherr 81k's lifting capacity at different boom lengths and operating radii. Use the tabs to switch between different configurations.
Load-Plus Table
| Radius (m) | 12.0m | 15.0m | 18.0m | 21.0m | 23.0m | 25.0m | 27.0m | 29.0m | 31.0m | 33.0m | 35.0m | 37.0m | 40.0m | 42.0m | 45.0m | 48.0m |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 48.0m | 6000 | 4830 | 4030 | 3440 | 3120 | 2860 | 2630 | 2430 | 2260 | 2110 | 1970 | 1850 | 1690 | 1590 | 1460 | 1350 |
| 45.0m | 6000 | 5360 | 4500 | 3870 | 3530 | 3240 | 2970 | 2720 | 2580 | 2410 | 2260 | 2130 | 1950 | 1840 | 1700 | - |
| 42.0m | 6000 | 5640 | 4710 | 4030 | 3670 | 3370 | 3100 | 2870 | 2670 | 2500 | 2340 | 2200 | 2010 | - | 1900 | - |
| 37.0m | 6000 | 6000 | 5040 | 4310 | 3930 | 3600 | 3320 | 3070 | 2860 | 2670 | 2500 | - | - | - | 2350 | - |
| 31.0m | 6000 | 6000 | 5470 | 4720 | 4320 | 3980 | 3690 | 3430 | 3200 | - | - | - | - | - | - | - |
The Load-Plus table shows lifting capacities (in kg) for various boom configurations at different radii.
Note: Empty cells indicate configurations that are not available or not recommended for operation.
Interactive Load Capacity Visualizer
Use the tabs below to explore how the Liebherr 81k's lifting capacity changes with jib radius across different configurations. The interactive visualizer helps operators understand the relationship between reach and lifting power for optimal crane operation.
Loading visualizer...
Load Capacity Charts
These charts visualize the load capacity of the Liebherr 81k at different jib radii. The diagrams show how the maximum load capacity decreases as the jib radius increases, helping operators determine safe operating limits for specific configurations.
Load-Plus Configuration
LM1 Configuration
30° Jib Angle Configuration
Operational Configurations
Load-Plus Configuration
The Load-Plus configuration enhances the standard lifting capacity by using additional counterweights and specialized boom configurations. This setup provides up to 20% more lifting capacity compared to the standard configuration, making it ideal for heavy lifting operations.
LM1 Configuration
The LM1 configuration represents the standard setup for the Liebherr 81k with normal counterweights. This configuration offers balanced performance for most everyday lifting operations while optimizing energy consumption and operational costs.
30° Jib Angle
When the jib is angled at 30 degrees, the Liebherr 81k achieves an increased hook height of up to 40.4 meters, approximately 14 meters higher than in horizontal configuration. This setup is particularly useful for reaching over obstacles or working in height-restricted areas.
Safety Systems
Electronic Monitoring
- Automatic load moment limitation
- Wind speed monitoring with alerts
- Slewing angle limitation capability
- Anti-collision system compatibility
- Hook height limitation
Operational Safety
- Remote control with emergency stop
- Automatic overload prevention
- Working range limitation
- Stable foundation monitoring
- Visibility aids and warning systems
Driving Units Specifications
| Driving Unit | Speed | Power (kW FU) |
|---|---|---|
| Rotation | 0 - 0.8 U/min | 5.0 kW FU |
| Trolley | 0 - 60.0 m/min | 3.0 kW FU |
| Trolley (Slow) | 0 - 25.0 m/min | 2 x 2.2 kW FU |
| Jib Luffing | 0 - 45°, 110 sec. | 3.0 kW FU |
Speed vs Load Capacity
This chart illustrates the relationship between load capacity and hoisting speed for the Liebherr 81k. As the load increases, the maximum hoisting speed decreases proportionally to maintain safe operation.
Maximum Lifting Capacity
At the maximum load capacity of 6000 kg, the crane operates at a reduced speed of 12.7 m/min to ensure safe lifting and precise control of heavy loads.
Maximum Hoisting Speed
With lighter loads of around 400 kg, the crane can operate at speeds up to 76.1 m/min, significantly improving operational efficiency for lighter materials.
Manufacturer Information
The Liebherr 81k is manufactured by Liebherr-Werk Biberach GmbH, a division of the Liebherr Group, a family-owned multinational equipment manufacturer founded in 1949 in Germany. Liebherr is one of the world's leading manufacturers of construction machinery and is known for innovative technology and high-quality products.
For official specifications and the latest information, visit Liebherr's official website.
Technical Documentation
Download detailed technical specifications for the Liebherr 81k self-erecting tower crane. This document provides comprehensive information for planning, operation, and maintenance.
Liebherr Tower Cranes Technical Specifications
Complete technical data, dimensions, load charts, and operating parameters for Liebherr tower cranes including the 81k model.
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