The STAKKAbox™ is a highly successful
family of pre-formed underground access chambers, vaults, manholes,
hand holes and underground boxes for buried network, duct and
equipment access. The STAKKAbox™ range provides operators with
a means of constructing chambers quickly and inexpensively, without
having to compromise on build quality.
Click the titles below for an in-depth description.
The STAKKAbox™ consists of 150mm deep ring sections, which are stacked on top of each other to form chambers of varying depths. Each ring is made of twin walls with vertical ribs spanning between the walls and castellated to positively interlock with its' neighbour above and below.
The concept works very well! Contractors can install a STAKKAbox™ far, far quicker than using traditional methods. For an average size of chamber (900mm x 900mm x 900mm) timings of as little as 30 minutes have been achieved. Whilst the material cost is higher than concrete, the savings on labour and plant on-site costs are huge and far outweigh this.
In addition to the significant savings that can be made on the cost of construction, site safety is greatly improved. Each section falls below the recognised international safe weight-lifting limit for one man of 25kg.
The vertical rib and twin wall matrix provide for a high degree of vertical compressive strength that resists the loads applied by vehicles that may pass over the unit when installed.
This Patented strength has been independently tested to vertical unsupported loads in excess of 50 tonnes. Vertical load tests that have also been applied on a cyclic basis in order to simulate the effect of trafficking. Under this test the chamber withstood a 40 tonne vertical load at the rate of one cycle per second for over 86,000 cycles within a 24 hour period.
Unlike many other pre-formed chambers, which only serve as formers for concrete, the STAKKAbox™ does not require any expensive structural backfill.
Every 150mm there is also a horizontal rib which runs the entire circumference of each section. When coupled with the interlocking feature, this means the finished chamber is a monolithic structure which is stronger than the sum of its parts. This provides excellent resistance against loads imparted laterally onto the side of the chamber.
The scenarios faced in todays real world construction environment, where streets are already full of existing buried services, means anything can happen on site! A duct may need to be installed at any place on the chamber wall or the chamber may need to be cut and fitted around the existing services or obstructions. The STAKKAbox™ caters for 98% of situations encountered.
The materials we use are not affected by frost, a major killer of concrete and brick chambers, therefore greatly improving the lifetime of the chamber. In addition to frost, the STAKKAbox™ is resistant to ground acids and alkaline, chemicals, petrol and diesel - all known killers of concrete.
The addition of specific accessories has resulted in the sales of tens of thousands of units to customers in industries from Telecommunications, Water & Drainage, Highways, Rail & Traffic Signalling to Gas & Power distribution.
The STAKKAbox™ is a highly successful
family of pre-formed underground access chambers, vaults, manholes,
hand holes and underground boxes for buried network, duct and
equipment access. The STAKKAbox™ range provides operators with
a means of constructing chambers quickly and inexpensively, without
having to compromise on build quality. 