Openreach Approved Telecoms Network Access Chamber System
STAKKAbox™ JMF is a range of modular and structural preformed access chambers that prove a modern alternative to brick built chambers. The system provides contractors with a means of constructing access chambers quickly and inexpensively, whilst offering improved build quality, reduced defects and enhanced site safety performance over traditional methods.
STAKKAbox™ JMF is the ONLY modular access chamber approved for use on Openreach networks, available in 102, 104 and 106 sizes.
Supplied in 150mm deep twinwall rings, STAKKAbox™ chambers are built by stacking sections to required depth. Each section weighs under 25kg, making it suitable for a single person to lift under manual handling guidelines.
The JMF system is moulded in HDPE and possesses excellent strength to weight properties. Each section is ribbed internally to improve loading performance.
Using the JMF system, complete chambers can be constructed from excavation to reinstatement in less than one hour.
| Openreach Reference | Clear Opening (L) x (W) | Depth per section | Section Weight | Typical chamber depth |
| JMF 102 | 725mm x 225mm | 150mm | 7.0kg | 600mm |
| JMF 104 | 915mm x 445mm | 150mm | 14.0kg | 750mm |
| JMF 106 | 1310mm x 610mm | 150mm | 19.0kg | 750mm |
Download our product size guide for more information on available sizes.
Lightweight 150mm deep sections are stacked on top of a concrete or Type 1 base to build the chamber to the desired depth.
There is no requirement for lifting plant or skilled box builders when building chambers.
Where required, rings can be cut to bridge over or around existing networks or obstacles.
JMF is only approved for Openreach installations in pedestrian areas that are rated B125
Using Cubis access chamber systems accessories can help save even more time. Our chamber options & accessories range allows installers to simply drop in, connect up tubes or ducts, backfill and walk away.
Conductive concrete is a cementitious and carbonaceous material which is a proven solution in the prevention of infrastructural conductivity grounding difficulties, speeding up and improving the performance of cabinet earthing.
