Enclosed Manhole Box Upper Extension – Steel
Product Description
Need to go deeper without compromising safety?
The Enclosed Manhole Box Upper Extension – Steel is built to extend your trench depth safely and securely. Designed to connect directly onto your Enclosed Manhole Box Lower Extension, this rugged steel upper section increases your shoring height without additional site disruption or the need for external edge protection.
Constructed for durability in the toughest conditions, it delivers the extra protection, compliance, and flexibility required for deep pit and chamber works across sewer, stormwater, utility, and civil excavation 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 Construction: Built for repeated use in demanding excavation environments
- Fully Enclosed Structure: Reduces fall risk and improves trench stability at greater depths
- Modular System: Stacks directly onto ASC’s Enclosed Lower Manhole Box to build depth safely
- Certified and Compliant: Meets Australian trench safety standards and site compliance requirements
- QR Tracked: Includes asset tracking via unique QR code for simplified certification management
Specifications
- Material: Steel
- Max Panel Pressure: 136kPa
- System: Stackable with ASC Enclosed Manhole Box Lower Extension – Steel
Common Applications
- Deep stormwater and sewer pit excavations
- Manhole construction and maintenance requiring full enclosure
- Civil infrastructure works involving multi-stage trenching
- Utility trenching where worker protection and compliance are critical
Why Choose the Steel Enclosed Extension?
The steel upper extension provides structural integrity for your deep trenching works while protecting crews from exposure to fall risks or shifting soil. It connects smoothly to ASC’s enclosed manhole base box, offering a scalable, certified trench protection system that keeps your crew safe and your project compliant.
Custom Builds and Variants Available
We offer custom-fabricated extensions in non-standard heights or with additional lifting features, built to suit your trenching conditions. Reach out for a tailored solution that fits your project perfectly.
View the Enclosed Manhole Box Lower Extension – Steel to complete your system.
Learn more about Safe Work Australia Model Code of Practice: Excavation work