Re: Prestressing strands 1958...

David Fisher wrote:

List:

 

What was the typical Fy for prestessing strands in 1958?

We’re doing some work at O’Hare and have the drawings, but they lack a lot of info.

 

Like Fy, for example.

 

Thanks!

 

David L. Fisher SE PE

Senior Director

 

The Fisher Companies Ltd. - Cayman

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For prelim. info, I'd use fy = 250 ksi, but I would definitely try to get a sample of the strand and get it tested before I'd rely on ANY value for "real design work."