Manhole Box Lower Extension – Steel (with Knife Edge)
Product Description
Need a rugged, open-end manhole box that provides full trench access and stability on angled sites?
The ASC Manhole Box – Lower Extension – With Knife Edge (Steel) is engineered for pit construction, stormwater, and utility trenching where soil conditions are tough and trench access needs to stay flexible. Its tapered edge assists with placement in tight or compacted ground, while the open-end layout makes equipment movement simpler.
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: Engineered for durability and high ground pressure resistance
- Knife Edge Design: Helps position the shield cleanly in compacted or angled soil conditions
- Open-End Access: Allows easier movement for excavators and pipe alignment
- Certified Safe: Rated to 81kPa and compliant with trench safety standards
- QR Tracked: Tagged for compliance and asset management
Specifications
- Material: Steel
- Max Panel Pressure: 81kPa
- System: Stackable trench shield – lower section (open end, knife edge)
Common Applications
- Manhole construction on curved or offset trench alignments
- Stormwater and sewer pit trenching
- Utility installations with multiple access points or complex alignments
- Civil sites needing strong, compliant trench edge protection
Why Choose the Steel Knife Edge Model?
This variant offers a rugged, open-ended system built for challenging digs. It supports heavier lifting gear, performs under high stress, and suits sites where trench shape, depth, and ground conditions require reliable strength and adaptability.
Need a Custom Fit?
We can tailor this unit to your job—custom lengths, lifting attachments, or structural reinforcement available on request.
View the Manhole Box Upper Extension – Without Knife Edge (Steel) to complete your stackable shoring system.
Check the Safe Work Australia Model Code of Practice: Excavation work for full regulatory information.