How to Choose the Right Potain Tower Crane: Capacity, Jib Length, and Project Requirements

Selecting the appropriate tower crane for a construction project requires careful evaluation of multiple factors. This guide outlines the key considerations when choosing a Potain tower crane, focusing on capacity requirements, jib length, and project-specific needs.

Understanding Capacity Requirements

Tower crane capacity refers to the maximum weight the crane can lift. However, this capacity varies depending on the jib extension and load position. A crane rated for 8 tons maximum capacity may only lift 2 tons at maximum jib extension.

Important: Always consult the crane's load chart to determine actual lifting capacity at your required jib extension. The load chart shows how capacity decreases as the load moves further from the mast.

Calculating Your Capacity Needs

Identify the heaviest loads: Determine the maximum weight you'll need to lift, including materials, formwork, and equipment.
Consider safety margins: Add a safety factor to your calculations. Industry standards typically recommend maintaining capacity well below maximum ratings.
Account for lifting accessories: Include the weight of slings, hooks, and other lifting equipment in your calculations.
Review load charts: Check the crane's load chart to ensure it can handle your requirements at the required jib extension.

Determining Jib Length Requirements

Jib length determines the crane's reach and coverage area. Selecting the appropriate jib length ensures the crane can access all required lifting points without repositioning.

Factors Affecting Jib Length Selection

Site Dimensions

Measure your construction site's dimensions and identify the furthest points where lifting operations will occur. The jib length must be sufficient to reach these points from the crane's planned position.

Crane Positioning

Consider where the crane can be positioned on your site. Factors such as ground conditions, access routes, and building layout affect optimal crane placement. A centrally positioned crane may require less jib length than one positioned at the site perimeter.

Building Height

Taller buildings may require longer jib lengths to maintain adequate clearance and reach upper floors effectively. Consider both horizontal reach and vertical clearance requirements.

Multiple Lifting Points

If your project requires lifting materials to various locations across the site, ensure the selected jib length can cover all necessary areas without frequent repositioning.

Project-Specific Considerations

Project Type

Residential Buildings: Typically require cranes with 5-8 ton capacity and 50-60 meter jib lengths
Commercial Buildings: Often need 8-10 ton capacity and 60-65 meter jib lengths
Infrastructure Projects: May require 10-12 ton capacity and 65-75 meter jib lengths
Industrial Facilities: Can require specialized cranes with higher capacities depending on equipment installation needs

Project Duration

Longer projects may benefit from purchasing a crane, while shorter projects might be better suited for rental arrangements. Consider the total project timeline and frequency of crane usage.

For projects lasting several months or years, owning a crane may provide cost advantages. For shorter projects or one-time needs, rental options may be more economical.

Site Constraints

Space Limitations: Compact sites may require cranes with smaller footprints or specific configurations
Access Routes: Consider how the crane will be delivered and assembled given site access limitations
Ground Conditions: Evaluate ground bearing capacity and stability requirements for crane foundation
Adjacent Structures: Consider clearance requirements from existing buildings, power lines, or other obstacles

Design Type Selection: Flat-Top vs Top-Slewing

Potain offers both flat-top (MDT/MCT series) and top-slewing (MC series) designs. Each has distinct characteristics:

Flat-Top Design (MDT/MCT)

• Reduced weight and easier transport
• Faster assembly procedures
• Better for multiple cranes in close proximity
• Typically lower wind resistance
• Suitable for various project types

Top-Slewing Design (MC)

• Traditional design with proven reliability
• Excellent stability and control
• Precise lifting operations
• Well-suited for longer-duration projects
• Established maintenance procedures

Selection Checklist

Use this checklist when evaluating tower crane options:

□ Maximum lifting capacity requirements identified
□ Required jib length calculated based on site dimensions
□ Load charts reviewed for capacity at required jib extension
□ Site constraints and access routes evaluated
□ Ground conditions and foundation requirements assessed
□ Project duration and usage frequency considered
□ Design type (flat-top vs top-slewing) selected
□ Safety margins and operational factors accounted for
□ Qualified professionals consulted for technical evaluation

Common Selection Mistakes to Avoid

Underestimating Capacity Needs

Failing to account for all load weights, including lifting accessories and safety margins, can lead to selecting an undersized crane.

Ignoring Load Charts

Maximum capacity ratings only apply at minimum jib extension. Always verify capacity at your required working radius.

Insufficient Jib Length

Selecting a jib that's too short may require frequent crane repositioning, increasing project costs and timeline.

Overlooking Site Constraints

Failing to consider access routes, ground conditions, and space limitations can result in installation difficulties or additional costs.

Conclusion

Choosing the right Potain tower crane requires careful analysis of capacity requirements, jib length needs, and project-specific factors. By systematically evaluating these elements and consulting load charts, construction professionals can select cranes that meet their project requirements while maintaining safety margins and operational efficiency. Always consult with qualified professionals to ensure proper crane selection and installation planning.

Browse our complete tower crane catalog to find the right model for your project, or contact us for expert guidance on crane selection.