Manhole Box Upper Extension – Steel (without Knife Edge)
Product Description
Need to extend your manhole box depth with maximum strength and reliability?
The ASC Manhole Box – Upper Extension – Without Knife Edge (Steel) is a robust modular shield designed to stack on ASC lower manhole boxes. Built from heavy-duty steel, it delivers exceptional trench wall protection while simplifying vertical alignment thanks to its flat base edge.
This extension is the ideal choice for deeper trench builds in demanding civil, plumbing, or utility environments.
Available Size Options
This product is available in multiple size options. Choose from:
- Height × Length (mm): Fixed-size panels (Select from the dropdown)
- Width (mm) – Fixed Strut: Selectable trench widths from outer panel face to outer panel face (Select from the dropdown)
Key Features
- Heavy-Duty Steel Build: Designed for long-term durability in tough trenching conditions
- No Knife Edge: Clean, flat edge simplifies stacking and trench alignment
- Modular Integration: Built to stack with ASC Lower Extensions for deeper pit protection
- Certified for Compliance: Constructed to meet Australian trench safety standards
- QR Code Tracked: Tagged for site traceability and asset management
Specifications
- Material: Steel
- Max Panel Pressure: 81kPa
- System: Stackable upper extension for ASC Steel Manhole Boxes
Applications
- Deep manhole trenching in civil or utility projects
- Public infrastructure works requiring durable shielding
- Sites using heavier equipment or operating under higher ground pressure
- Installations where structural integrity is critical
Why Choose This Model?
If you’re working on larger or longer-term jobs where resilience matters, this steel upper panel ensures safe stacking and lasting protection. It’s the trusted choice for crews who demand performance in every layer of the shoring system.
Need a Custom Variant?
We can build to spec — custom dimensions, reinforced edges, lifting eyes or other mods available on request.
View the Manhole Box – Lower Extension – Without Knife Edge (Steel) to complete your stackable configuration.
Refer to the Safe Work Australia Model Code of Practice: Excavation work to ensure regulatory compliance.