Glazing Robots vs. Below-the-Hook Vacuum Lifters: Choosing the Right Tool
Glass installation requires precision, safety, and speed. The right lifting equipment is crucial.
Two main technologies dominate modern glazing: glazing robots and below-the-hook vacuum lifters. Both enhance safety and efficiency but shine in different situations.
This guide looks at features, benefits, and top use cases. It will help you choose the best tool for your project.
Glazing Robots (Glass Handling Robots)
Glazing robots are self-propelled machines that lift, transport, and install glass panels. They work best at ground level or low heights. These robots are perfect for internal fit-outs and low-rise glazing. They work well where crane access is difficult.
Key Features:
- Wheeled or tracked base for easy movement.
- Hydraulic lifting arm (up to ~6 m reach).
- Vacuum suction head with many pads.
- Joystick or touchscreen controls for precision.
- Built-in safety systems (tilt sensors, vacuum alarms, emergency stops)
Common Models: SmartLift SL408, Winlet 785, Quattrolifts Express 200
Glazing robots offer a safer and more efficient alternative to manual handling.
Below-the-Hook Vacuum Lifters
Below-the-hook vacuum lifters are systems hung from cranes. They use suction pads to lift large or heavy glass panels, especially at height.
Key Features:
- Modular suction pad layouts (4–12+ pads) for various panel sizes.
- Manual or motorised 360° rotation and 90° tilt.
- Remote control options for safe handling.
- Redundant safety systems with alarms and load monitoring.
Common Models: VIAVAC GBX, GBL, GB-H
Best for: high-rise glazing, curtain walls, rooflights, and large glass units where cranes can be used.
Quick Comparison
| Feature | Glazing Robot | Below-the-Hook Vacuum Lifter |
| Lift Capacity | 300–800 kg | 500–1,800 kg+ |
| Height | Up to 6 m | Unlimited (crane-dependent) |
| Mobility | Self-propelled | Requires crane/hoist |
| Setup Time | 5–10 min | 5-10 min (crane-dependent) |
| Crew | 1–2 operators | 2–3 + crane driver |
| Hire Cost | £200–400/day | £80–200/day (if crane on-site) |
| Best Use | Internal, low-rise, tight access | High-rise, large/curved panels |
| Limitations | Needs firm ground; limited height | Weather-sensitive; crane-dependent |
When to Choose Each System
Use a Glazing Robot When:
- Installing at heights of under 6 metres
- Glass weighs less than 800kg
- Working on internal projects or ground-level shop fronts
- Access to cranes is either limited or too costly.
- You need a quick setup and mobility.
- Working in city centres or completed buildings with limited access
Example: Putting up glass partitions in an office or shopfront when a crane can’t be used outside.
Use a Below-the-Hook Vacuum Lifter When:
- Glass exceeds 600-800kg or is oversized/curved
- Installation is at height (multi-storey, atriums, roofs)
- A crane is already on-site or nearby
- You need custom pad layouts for complex panels
- Working on high-rise façades or curtain walling
Example: Installing 1,200kg curtain wall panels on a 12-storey building.
The Hybrid Approach: Maximum Efficiency
Leading contractors increasingly use both systems on complex projects:
| Task | Recommended Tool |
| Structural glazing/façade work | Below-the-hook lifters + tower cranes |
| Ground floor retail/entrance | Glazing robots |
| Internal fit-out phases | Glazing robots |
| Rooflight installation | Vacuum lifters + mobile cranes |
| Upper-level balustrades | Vacuum lifters + crane |
This approach typically reduces project time by 15-25% while improving safety outcomes.
Key Advantages
Glazing Robots:
- Independence from cranes cuts costs.
- Rapid deployment with little site preparation.
- Exceptional precision for final placement.
- Reduced manual handling boosts safety.
- All-weather capability for covered areas.
Below-the-Hook Vacuum Lifters:
- Superior lifting capacity for large glass.
- Unlimited height reached, limited only by the crane.
- Flexible configurations for any glass shape.
- Cost-effective if cranes are on-site.
- No ground access issues – lifts from delivery vehicles.
Conclusion
Glazing robots and below-the-hook vacuum lifters complement each other. The goal is to match the right tool to your project needs.
For greatest project success:
- Assess each phase independently.
- Consider total ownership costs, not just daily rates.
- Invest in training and safety procedures.
- Maintain flexibility for changing site conditions.
- Partner with experienced suppliers.
Both systems have changed glazing from a risky, labour-heavy job into a precise, efficient process. This improves results and protects teams and profits.
Need help with your glass installation?
If you’re planning a glazing project and want expert advice on the right vacuum lifter for the job, we’re here to help. Whether it’s a compact city install, large façade glazing, or a specialist curved glass lift, our team can recommend the most suitable VIAVAC solution for your site. Get in touch to discuss your glass installation requirements and ensure your project is completed safely, efficiently, and with the right equipment from the start.
Related Blogs:
The Complete Guide to the VIAVAC Glass Vacuum Lifter Range
How to Install Glass Below a Building Overhang
5 Uses For Glass Vacuum Lifters
