BBR has developed 4 stay systems for bridge and suspended roof applications. All of them are manufactured under strict quality controlled conditions either in a factory or on the construction site. Bundles of wires 7mm dia., strands 0.6" dia. or carbon fibres 5mm dia. are encased in a UV-resistant PE duct and provided with fatigue resistant anchorages at both ends.

BBR STAY anchorages have been developed out of the BBR CONA range for stay cables made up of strands preferably assembled on site. The strands may be threaded one by one into the pre-installed ducts and gripped by special wedges in a common anchor head with a lock nut and shims. Each strand is stressed individually to predetermined forces to ensure final equal stresses. Cable forces can be regulated by means of a jack with a small stroke. The configuration of the CONA stay anchorages may include a built-in damping device in the transition zone between the anchorage and the free length of the cable.

The standard range of BBR CONA stay anchorages lies between 19 and 91 strands 0.6" dia., corresponding to approx. 5 MN and 24 MN ultimate capacity. The fatigue resistance at 2 million load cycles can be assumed to reach at least 200 N/mm², the actual value depending on the intrinsic fatigue strength of the strands employed.

Alternatively stay cables with CONA stay anchorages can also be preassembled in a workshop and installed as complete units.

Corrosion protection of the free cable length of above systems is normally ensured by injecting the PE duct with cement grout. Alternatively, in the factory, the PE duct can be filled with a corrosion inhibiting compound and galvanised wire or strand may be used.