Enclosed Manhole Box Lower Extension – Alloy
Product Description
Need a fully enclosed trench safety solution that’s lighter, faster to handle, and built for deep pit work?
The ASC Enclosed Manhole Box – Lower Extension (Alloy) delivers strong, lightweight protection for sewer, stormwater, and utility excavations. Made from corrosion-resistant aluminium alloy, this lower box extension improves trench safety without slowing your team down.
It’s designed to reduce fall risk, eliminate the need for extra steel plates, and offer full edge protection in deep manhole or pit works—all while making site setup easier for crews using smaller machinery.
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
- Lightweight Alloy Construction: Easier to move, lift, and position with smaller machines or crews
- Fully Enclosed Safety: Protects crews by reducing fall risk and minimising exposed trench edges
- Expandable Coverage: Compatible with ASC Upper Extensions to increase trench depth
- Certified & Compliant: Built to Australian trench safety standards
- QR Tracked: Includes asset management tags for certification and project traceability
Specifications
- Material: Aluminium Alloy
- Max Panel Pressure: 222kPa
- System: Stackable base unit compatible with ASC Enclosed Manhole Upper Extensions – Alloy
Best Use Cases
- Sewer and stormwater pits in suburban or restricted-access areas
- Utility excavations where weight or lift restrictions apply
- Plumbing and reactive maintenance requiring fast deployment
- Civil works where safety and mobility need to work together
Why Choose the Alloy Version?
When your site demands full enclosure but limited access or lift capacity makes steel impractical, the alloy version is the smarter choice. It simplifies logistics while still delivering full trench protection, especially on tight or time-sensitive jobs.
Need a Custom Build or Knife Edge Option?
We can customise your alloy manhole box with knife edge panels, lifting points, or specific dimensions. Contact us to create a system tailored to your excavation requirements.
View the Enclosed Manhole Box – Upper Extension (Alloy) to build a complete system.
Learn more about Safe Work Australia Model Code of Practice: Excavation work