Radius Quadbox Stakkabox Duct Access Chamber Section - 915mm x 445mm x 150mm
Approved for use on BT Openreach networks, these Radius Quadbox sections form a modular duct acces...Approved for use on BT Openreach networks, these Radius Quadbox sections form a modular duct access chamber system. Each 150mm section is laid on a concrete or Type 1 base and stacked to the required height. Sections can be cut to fit around existing networks or obstacles and duct entries can be made using a holesaw. Integrated guides identify correct drilling points to ensure proper duct spacing. Covers, steps and cable management systems are available separately to complement the chamber system.
Best current price£74.14from Professional Building Supplies
The Radius Quadbox Stakkabox (JMF104) is designed for professional utility contractors and network installers seeking a modular, durable solution for BT Openreach-approved duct access. This 915mm x 445mm chamber section offers the flexibility of stackable height adjustment and site-specific duct entry, though it requires a properly prepared base and independent assembly of accessories like covers or cable management.
All features
Model Part Number
JMF104
Brand
Radius
Extended Product Information
FAQs
Are these sections compatible with other brands?
These are designed for the Radius Quadbox system and are specifically approved for BT Openreach networks; mixing with non-standard components is not recommended.
What is the height of each individual section?
Each section is 150mm in height.
Can I cut the sections to fit around pipes?
Yes, the material is designed to be cut to accommodate existing obstacles or legacy networks on-site.
Are the covers included with the section?
No, covers, steps, and cable management systems must be purchased separately.
What tools do I need for duct entry?
You will need a holesaw of the appropriate diameter, using the integrated guides provided on the section for correct spacing.
Troubleshooting
Chamber is not level after stacking
Ensure the base foundation (Type 1 or concrete) is perfectly leveled before placing the first section.
Duct entry point does not align with existing ducting
Use the integrated drilling guides to re-evaluate placement; if necessary, use a larger hole saw or adapter to accommodate misaligned ducts.
Difficulty stacking sections
Check the perimeter of each section for debris or damaged locking mechanisms; ensure they are clean before pressing into place.
Pros and Cons
Pros
Modular system allows for exact depth configuration
Validated for BT Openreach network standards
Flexible installation allows cutting around existing infrastructure
Requires a separate concrete or Type 1 base foundation
Covers, steps, and cable management components sold separately
Requires manual assembly and on-site modification for duct entry
Setup, Compatibility & Care
Preparation: Prepare the trench floor with a clean, level surface of Type 1 material or concrete. Ensure the area is cleared of debris.
Stacking: Place the first section and ensure it is level. Add subsequent sections until the final chamber depth is achieved.
Ducting: Mark the required entry points using the integrated guides. Use a professional-grade holesaw to cut the openings.
Completion: Once the structure is set, install necessary accessories such as cable management racks or steps (sold separately) before sealing with an approved cover.
Maintenance: Regularly inspect the chamber interior for sediment buildup or obstruction. Ensure the cover is properly secured to prevent unauthorized access and ingress of surface water.