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The Crane Lift Calculator helps contractors and crane operators verify lift safety by calculating crane capacity at different radii. Determine if a crane can safely lift a load at a given radius and identify required crane size.
Crane capacity decreases significantly as lift radius increases. Proper lift planning ensures loads don't exceed crane capacity at the working radius, preventing accidents and equipment damage. Safety factors account for dynamic loads, wind, and other variables.
Enter load weight, lift radius, and crane capacity to calculate allowable load and utilization percentage. The calculator helps plan safe lifts and select appropriately sized cranes for construction operations.
Features
Everything you need
- Load capacity at radius calculations
- Safety factor applications
- Utilization percentage determination
- Lift safety verification
- Capacity reduction with radius
- Multiple crane size support
- Imperial and metric units
How it works
Simple workflow
- 1Enter load weight to be lifted
- 2Specify lift radius from crane center
- 3Input crane rated capacity
- 4Review calculated capacity at radius
- 5Verify load is within safe limits
Use cases
Built for real-world scenarios
Lift planning
Verify crane capacity before planning construction lifts and equipment placement.
Crane selection
Determine required crane size based on load weight and lift radius requirements.
Safety verification
Ensure lifts comply with safety requirements and don't exceed crane capacity.
Site planning
Optimize crane placement to minimize lift radius and maximize capacity.
FAQ
Frequently asked questions
Crane capacity decreases as radius increases due to moment arm. Capacity at radius ≈ Capacity at minimum radius × (1 - radius/max radius). Always consult crane load charts for exact values.
Typical safety factors: 75-80% of rated capacity for static loads, 50-60% for dynamic loads or lifts with wind. Higher factors provide more safety margin.
Radius (distance from center), boom angle, counterweight configuration, outrigger setup, wind conditions, and load dynamics (swinging, acceleration).
Load charts show capacity at different radii and boom angles. Find intersection of radius and boom angle to determine maximum load. Always use chart for actual lifts—calculators provide estimates only.
Have a suggestion?
We're always looking to improve our calculators. If you have ideas for new features, improvements, or found something that could work better, we'd love to hear from you.
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