www.sefindia.org

[inchak at tatasteel.com]

Dear Mr. Arun Kashikar
You asked:
"If I recollect correctly IS:13920 puts upper limit on yield strength of
reinforcement as 415MPa."
My response to that:
NO
The AMENDMENT NO. 2 MARCH 2002 TO IS 13920 : 1993 DUCTILE DETAILING OF
REINFORCED CONCRETE STRUCTURES SUBJECTED TO SEISMIC FORCES - CODE OF
PRACTICE
Clearly mentions:
QUOTE
(Page 3, clause 5.3) - Insert the following at the end of the clause:
'However, high strength deformed steel bars, produced by the
thermo-mechanical treatment process, of grades Fe 500 and Fe 550, having
elongation more that 14.5 percent and conforming to other requirements of
IS 1786 : 1985 may also be used for the reinforcement.'
UNQUOTE
So now there is no  upper limit on yield strength of reinforcement.


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