BridgeView, Episode 17: Stressing the permanent cables

In the final part of our series on the Portland-Milwaukie Light Rail Bridge's permanent cable system, John Lozner, of Kiewit Infrastructure West, discusses the permanent cable stressing process used to support the bridge's deck.

This is the third of three episodes about the cable-stay system and how it is installed on the bridge.

[theabba]

Lovely, I just started structural Engineering and this is super helpful

[peterdow]

About 2:18 "If needed, down the road, 10 or 20 years, if the bridge starts to sag a little bit, we can pull on them and stress them again". What, AFTER 2:49 "the strands will be cut", for capping off, you still have enough length of protruding strand to get a grip on with tools to restress it? What, with the same tools? Or is a different procedure required to restress a strand that has been cut for capping off? Is there is a danger when restressing a cut-off strand that if you lose your grip on it with tools, the strand will contract back inside the cable and you can't get a hold of it again? How many people actually have experience of restressing cut-off strands? More or fewer than have walked on the moon? Is there a video of someone restressing cut-off strands because I would very much like to watch that video?