Understand The Matching Principle of Tonnage And Arm Length in BOB-LIFT in 3 Minutes

In engineering construction, cranes are like the "strongmen" on the construction site, but choosing the wrong model may lead to low efficiency or even safety hazards. Many users often wonder: "What tonnage of crane does my construction site actually need?" How should the arm length be chosen?

Take the BOB-LIFT crane as an example. We have summarized the most practical selection tips to help you quickly match the most suitable model!

Look at the tonnage: The lifting capacity is the key

The "tonnage" of a crane is like the "strength" of a person. For instance, a 25-ton crane indicates that it can lift 25 tons of weight under optimal conditions. But note:

The actual lifting capacity will be affected by the working environment

It is recommended to keep a 20% safety margin for daily use

Reference for tonnage selection

3-5 tons: Suitable for factory maintenance and small equipment transportation

10-20 tons: Meets the demands of most municipal projects

Over 25 tons: Specifically designed for large-scale projects such as wind power and Bridges

Practical tip: After estimating the weight of the heaviest item, add a 20% safety margin to get the tonnage you need.

Look at the arm length: The working range determines efficiency

Arm length is like "the length of the arm", directly affecting the range of work:

Short arm (10-20 meters) : Suitable for indoor operations with limited space

Long arm (over 30 meters) : Specifically designed for high-altitude and long-distance operations

Important rule:

For every additional 10 meters in arm length, the lifting capacity may decrease by 30-50%! For example, a 25-ton crane:

When the arm length is 12 meters, it can lift 18 tons from a distance of 10 meters

When the boom is fully extended at 42 meters, it can only lift 8 tons at the same distance

The Golden Match Rule

Remember this simple formula:

Required tonnage ≈ (Maximum lifting capacity ×1.2) ÷ (Working distance /10)

For example: 10 tons of goods need to be lifted 15 meters away?

Calculation: (10×1.2)÷(15/10)=16 → Choosing a 20-ton class crane is the safest option.

Intelligent Enhancement of BOB-LIFT

Real-time display of lifting load data and automatic calculation of safety range

The original U-arm design takes into account both strength and flexibility

Military-grade steel ensures stability under extreme working conditions

Practical Q&A

Question: "I need to lift 15 tons of equipment 20 meters away. How to choose?"

Answer: It is recommended to choose a 50-ton crane or adjust the working position to shorten the distance.