Steel cable specification

[woa100]

Hello. I'm doing some research on the tower of the Montreal Olympic Stadium and came across a specification I haven't been able to decipher: "Freyssinet 24T/15". This is in reference to the type of post-tensioned pre-stressing steel cable used to support the structure. The specification was listed in the June 3, 1976 edition of New Civil Engineer. What does this specification refer to? The cable's ultimate stress? Its diameter? Any help would be greatly appreciated.
Thanks very much!

 

[Ussuri]

Freyssinet are a french based contractor. According to their website they started of in pre and post tensioned concrete in the early part of the 1900's moving into other areas after that.

You might try contacting the company directly.

http://www.freyssinet.com/intranet/internetFi.nsf/web/indexus.htm

 

[Zambo]

I am not sure about the "T" it should be the name of their range. For example bridges and other civil structures use the Freyssinet "C" range. Each range will have anchorages, ducts and jacks to make up a prestressing system.

24 means the number of 7 wire strands. 15 means the 7 wire strands are each nominally 15mm diameter.

so the specification is that each tendon is made from 24 strands. Each strand is made from 7 x 3mm wires which form a strand of nominal 15mm diameter.