March 18, 2019 Kym Graves

BLOG – Post-Tensioning Bridge Segments

Once Selmon Extension construction crews set the full span of segments between each pier, they’re pulled together with post-tensioning, which is a technique for reinforcing concrete. Here’s an example of similar post-tensioning cables that will be utilized to hold the segments together.

There are multiple sets of post-tensioning strands ranging from 12-strand to 29-strand cables. The individual strands are supplied in large coils and are fed, one at a time, into the concrete-encased conduits to create each bundle. Each bundle of strands is tensioned using large hydraulic jacks weighing from 600 pounds to 1200 pounds.



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