Enclosed Manhole Box Upper Extension – Alloy
Product Description
Looking to extend your manhole box depth without adding weight?
The ASC Enclosed Manhole Box – Upper Extension (Alloy) gives you the flexibility to build deeper, safer trench systems with easier handling and faster setup. Built from corrosion-resistant aluminium alloy, this extension connects seamlessly to ASC’s Enclosed Manhole Box – Lower Extension.
Ideal for projects requiring greater protection around deep sewer or stormwater pits, it delivers lightweight strength and compliance without sacrificing stability or performance.
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 transport, lift, and position with smaller machines or crews
- Fully Enclosed Safety: Reduces fall risk and increases protected trench area
- Modular Integration: Designed to stack directly on ASC Enclosed Manhole Box – Lower Extension
- Certified and QR Tracked: Compliant with Australian trench safety standards and tagged for site traceability
- Custom Fabrication Available: Options for alternate heights, lifting points, or knife-edge configurations
Specifications
- Material: Aluminium Alloy
- Max Panel Pressure: 136kPa
- System: Stackable upper extension for ASC Enclosed Manhole Boxes – Alloy
Applications
- Deep pit work in restricted access areas
- Stormwater or sewer trenching with depth variation
- Utility maintenance where trench safety setup needs to be quick
- Civil works requiring certified edge protection at increased height
Why Choose the Alloy Version?
Aluminium alloy delivers certified trench safety performance with significantly lower handling weight. It reduces site labour, speeds up trench shield assembly, and improves equipment flexibility on constrained or remote sites.
Need a Custom Variant?
We can modify this extension to suit your trench specs—alternate heights, reinforcements, and more are available.
View the Enclosed Manhole Box – Lower Extension (Alloy) to complete your lightweight modular system.
Review the Safe Work Australia Model Code of Practice: Excavation work