e-mosty December 2018 e-mosty December 2018 | Page 60

VII. CABLES
Adjustable sockets are used on the main span and an
adjuster block made from 80mm steel plate in
combination with 32mm threaded bar is used at the
anchorage. All of the cable attachment points have
been designed with an additional 50 diameter hole to
accommodate the stressing equipment.
The bridge uses 1x37 1620MPa spiral strand cables
sourced from Germany. For the main span 20mm
cables are adopted, and for the back-spans 25mm are
used. There are 6 sets of cables for the main span (12
total) and 3 sets for the back-span (6 total).
Corrosion protection of the cables is achieved by the
adoption of a minimum 250g/m2 coating of 95% zinc
+ 5% aluminium to all strands making up the strand.
Cables are designed as per the Post Tensioning
Institute (PTI) Recommendations for Stay-Cable
Design, Installation and Testing, 6th edition 2012.
Figures 14 and 15 ←: Spiral strand stay cable detail
Back-span cables being stressed
Figures 16 – 18 ↙ ↓: Completed Bridge
4/2018