Olympic Stadium in Munich (Germany)

Since the early days of post-tensioning, BBR Stay Cable Technology has been recognized as one of the most advanced and the most reliable systems on the market. BBR is not only the godfather and inventor (1958) of high fatigue resistant wire stay cables, but has also pioneered, invented (1968) and constructed the world’s first project using modern parallel strand stay cables and has invented (1994) and successfully applied the worlds first carbon stay cables. The three BBR stay cable technologies are:

HiAm CONA

strand stay cable system

HiEx CONA

strand extradosed cable system

DINA/HiAm

wire stay cable system

Carbon

carbon stay cable system

Today, BBR Stay Cable Technology can be used for the following applications:

• Cable Stayed Bridges have been built in rapidly increasing numbers since 1950 and have been found to be especially economical for medium to long-span bridges from 100 to 1000 meters, where technical and economic arguments dictate this solution. For smaller bridges, other parameters may be decisive for the choice of a cable stayed solution (reduced depth of deck, construction methodology, aesthetics etc.). BBR Stay Cable Technology is the ideal choice for the cables.
• Suspension Bridges have been used since ancient times and nowadays suspension bridges with spans close to 2000 meters have been built. BBR Technology can be used for the main suspension cables as well as for the hangers.
• Roofs of grandstands, stadiums, aircraft hangars and other light-weight wide-span structures are an ideal application for BBR Stay Cable Technology.
• Towers for communication facilities, chimneys and antennas as well as wind power stations can be stabilized using BBR Stay Cable Technology.

Extensive research, testing and development efforts place BBR at the forefront in the field of post-tensioning and stay cable applications. BBR also offered a variety of solutions against cable vibration, such as the BBR Square Damper and cable surface treatments. To assure the highest quality product, all of the system components are subjected to the most stringent testing and quality assurance procedures, based on internationally recognized codes and recommendations.

For many years the minimum fatigue test strength for stay cable systems has been 160 N/mm2 (PTI). In recent years a stress range of 200 N/mm2 for 2x106 load cycles in combination with angular rotations at the anchorages has been adapted and is now specified by most codes and recommendations. BBR Stay Cable Technology has fulfilled such fatigue testing, already decades before these provisions were considered to be state of the art.

Whereas many cable suppliers built their first major cable supported structure in the late 1970’s and early 1980’s, BBR stay cable technology was used for the first time already in the late 1950’s and since those days, BBR Stay Cable Technology has been used in over 300 major structures around the world - including the breathtaking Tatara Bridge in Japan, which has the longest main span to have been constructed in the 20th Century.

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