Enclosed Manhole Box Lower Extension – Steel
Product Description
Need fully enclosed trench protection for deep sewer or stormwater excavation?
The Enclosed Manhole Box – Lower Extension (Steel) is built for maximum safety and strength in high-risk trenching environments. It expands the protected zone around manholes, chambers, and deep pits—reducing fall hazards and eliminating the need for additional steel plates.
Engineered for long-term durability, this steel manhole box extension is ideal for civil contractors needing full enclosure, depth, and compliance in demanding projects.
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 repeated use on high-risk civil and utility sites
- Fully Enclosed Design: Eliminates exposed edges and increases site safety
- Expandable System: Compatible with ASC PRO Extensions to increase depth and coverage
- Certified and Compliant: Meets Australian trench safety regulations
- QR Tracked: Each panel is asset tagged for certification access and project traceability
Specifications
- Material: Steel
- Max Panel Pressure: 222kPa
- System: Compatible with ASC PRO and Manhole Box Extensions
Best Use Cases
- Sewer and stormwater pit excavations
- Manhole construction and repair works
- Civil infrastructure projects requiring deep, secure trench access
- Utility excavations where trench fall protection is critical
Why Choose a Fully Enclosed Manhole Box?
Unlike standard trench shields, the fully enclosed design of this extension dramatically improves safety around deep excavations. It creates a contained work zone without relying on additional steel plates or edge controls—saving time and improving crew protection on-site.
Need a Custom Size or Knife Edge Variant?
We can build this manhole box extension to your spec—including alternative dimensions, knife edge options, and lifting features. For enclosed protection tailored to your trenching needs, contact our team.
View the Enclosed Manhole Box – Upper Extension (Steel) to expand your setup vertically.
Learn more about Safe Work Australia Model Code of Practice: Excavation work