What is a Roll Out Cantilever Rack and How Does it Work?
A roll out cantilever rack is a storage system designed for long, bulky items like pipes, metal bars, and lumber. Unlike fixed cantilever racks, these racks feature sliding or telescoping arms that extend outward, allowing operators to retrieve materials without reaching deep into the rack or using excessive aisle space.
The system works by:
- Mounting telescopic arms on a sturdy frame
- Rolling out the arms when accessing items
- Retracting them to reclaim aisle space when not in use
This design improves safety, reduces handling time, and allows narrower aisle layouts compared to fixed racking systems.
What is the Standard Aisle Width for Roll Out Cantilever Racks?
The recommended aisle width between two roll out cantilever racks is typically around 1.6 meters.
Why 1.6 Meters is the Common Recommendation
A 1.6-meter aisle allows the cantilever arms to fully extend while leaving enough space for operators to store and retrieve goods without obstruction. This dimension suits most warehouses that rely on manual or small-equipment handling.
When Wider Aisles Are Necessary
If forklifts or large handling equipment are used, aisles may need to be 4–5 meters wide. Forklifts have a larger turning radius, making extra space critical for maneuvering. This is one reason many facilities prefer roll out cantilever racks—they save aisle space compared to fixed racks.
What Factors Affect Aisle Width in a Roll Out Cantilever Rack System?
Multiple operational and environmental factors influence the aisle measurement.
The Impact of Handling Equipment
Forklifts, cranes, or specialized loaders require more maneuvering space. Narrow aisles work for manual handling, but motorized equipment demands wider clearances.
The Role of Product Size and Shape
Longer or wider materials, like pipes and metal profiles, may require additional aisle width for safe handling.
High-Use vs. Low-Use Storage Areas
In areas with frequent loading/unloading, a slightly wider aisle can boost efficiency. In low-use sections, reducing aisle width can maximize storage density.
How to Optimize Aisle Space for Efficiency and Safety
Maximizing aisle efficiency is about more than just width—it’s also about strategic design and maintenance.
Flexible Layout Adjustments
Not all warehouse areas need the same aisle space. Adjust aisle widths based on use frequency and equipment type.
Safety Signage and Operator Awareness
Posting visible safety signs on both sides of an aisle can remind staff to maintain safe distances.
Regular Inspections to Keep Aisles Clear
Obstructions can lead to accidents and slowdowns. Routine checks keep aisles safe and functional.
Cost Implications of Aisle Width Decisions
Aisle width is more than a space-planning detail — it’s a direct cost factor in warehouse operations.
- Real Estate Utilization
- Every meter of aisle width consumes valuable warehouse floor space.
- Switching from a 4–5 m aisle (fixed racks) to a 1.6 m aisle (roll out cantilever rack) can free up 40–60% more storage capacity in the same footprint.
- Equipment Costs
- Narrow aisles reduce the need for large forklifts, lowering purchase and maintenance costs.
- Smaller handling equipment typically uses less fuel or electricity.
- Labor Efficiency
- Shorter travel distances between storage locations improve picking speed.
- The time saved per retrieval reduces labor hours and increases throughput.
Cost Comparison Table: Roll Out vs. Fixed Cantilever Racks
| Feature | Roll Out Cantilever Rack | Fixed Cantilever Rack |
| Recommended Aisle Width | 1.6 m | 4–5 m |
| Storage Density | High | Medium |
| Forklift Requirement | No need | Larger turning radius needed |
| Initial Investment | Moderate | Low |
| Long-term ROI | High (space savings, efficiency) | Lower |
Roll Out Cantilever Rack Aisle Width: Best Practices Summary
For most setups, 1.6 meters between two roll out cantilever racks is optimal. Wider aisles (4–5 meters) may be necessary for forklift use. The best width depends on your equipment, product dimensions, and operational flow.
FAQ on Roll Out Cantilever Rack Aisle Planning
Q: Can I make my aisles narrower than 1.6 meters?
A: Yes, but only in low-traffic areas or where goods are handled manually without extending arms fully.
Q: Why choose roll out cantilever racks over fixed racks?
A: They reduce aisle space requirements and improve accessibility, especially for long materials.