Manhole Box Lower Extension – Alloy (with Knife Edge)
Product Description
Need lightweight trench protection with angled access and open-end flexibility?
The ASC Manhole Box – Lower Extension – With Knife Edge (Alloy) is a high-performance trench shield designed for manhole construction, stormwater pits, and chamber access where tapered placement and mobility are critical. It’s the ideal solution for confined or reactive worksites requiring open-end access and fast setup.
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
- Knife Edge Design: Tapered base for smoother ground entry in compacted or reactive soils
- Open-End Access: Easier for excavator arms, pipes, or formwork to manoeuvre through
- Lightweight Alloy Build: Easy to lift, crane, and position with compact site equipment
- Certified Safe: Rated to 81kPa and compliant with Australian trench safety standards
- QR Tracked: Fitted with traceable tagging for asset management and compliance checks
Specifications
- Material: Reinforced Aluminium Alloy
- Max Panel Pressure: 81kPa
- System: Stackable trench shield – lower section (open end, knife edge)
Common Applications
- Manhole construction at alignment curves or offsets
- Stormwater or sewer pit works in tight-access locations
- Utility trenching that requires frequent box repositioning
- Remote or mobile crews needing lightweight solutions
Why Choose This Alloy Knife Edge Model?
This configuration gives crews maximum access flexibility while reducing trench wall disruption. The tapered base and open-end layout streamline installation in constrained or hard-digging sites—ideal for projects demanding speed and manoeuvrability.
Need a Custom Fit?
We can manufacture alternate panel sizes, integrate lifting points, or reinforce structures based on your project needs.
View the Manhole Box Upper Extension – Without Knife Edge (Alloy) to complete your stackable trench shield system.
Refer to the Safe Work Australia Model Code of Practice: Excavation work for compliance requirements.