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 CARBON anchorages are the youngest member of the BBR stay cable family. They consist of up to 241 CFRP (Carbon Fibre Reinforced Polymer) wires of 5mm dia. and a corresponding load carrying capacity of 12'000 kN. Its breaking load is up to 90% of the total wire capacity. Because of relatively poor lateral properties of the CFRP wires, including interlaminar shear, this high capacity could only be obtained by developing a suitable anchoring system. Therefore EMPA (Swiss Federal Laboratories for Materials Testing and Research) in collaboration with BBR developed a system, similar to the BBR HiAm anchorage, consisting of an anchor sleeve with conical inner boring filled with graded layers of ceramic granules and polymer resin.

The exceptional high fatigue strength (up to 10 million load cycles with 250 N/mm²) combine with light weight, corrosion free properties, (i.e. not requiring grouting) make this system highly suitable for bridges with high traffic loads and for structures in corrosive environments, such as offshore platforms, or in industrial zones.

In order to protect the wires against wind erosion and UV radiation a polyethylene or similar sheath is adequate for shielding.

Installation and stressing procedure of all Stay Cable Systems depends whether the stay cable is pre-assembled and transported to the construction site as a complete unit or whether it is assembled on site.