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| IMAGE CREDIT : FIB |
The fib 89 is a technical guidelines regarding design, testing, acceptance, installation, qualification, inspection and maintenance of cable systems using pre-stressing steels (strands or wires) as tensile elements which can be applied internationally.
The fib 89 recommendations are meant to be applicable for cable systems to be used in cable supported structures such as cable-stay or extradosed bridges and other suspended structures such as roofs. They may also be used for hangers in arch structures and as suspension cables, as appropriate.
Requirements and comments are given for all parties involved in design and construction in order to aim for consistency, high quality and durability.
The essential subjects of fib 89 are below mentioned :
- Design and detailing of cables including saddles and damping devices
- Durability requirements and corrosion protection systems
- Requirements for the materials
- Testing requirements for the cables
- Installation, tolerances, qualification of companies and personnel
- Inspection, maintenance and repair
The main subject of these recommendations is cables with tensile elements consisting of pre-stressing steel in the form of strands or wires. Bars, which may be of practical use for small structures and/or architectural applications, are not covered in these recommendations.
These recommendations do not cover the technology of cables whose tensile elements are ropes, locked-coil cables, etc. or which consist of composite materials.
In many cases the specified performance criteria may also be applicable to these systems, although numerical values given for the acceptance criteria may need to be adjusted.
For these systems it has been difficult to provide multiple protective layers similar to those specified for cables made from pre-stressing steel and therefore, the quality of corrosion protection may not be equivalent.
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