Unformatted text preview: d
for use in structures
to severe damage
( other than wind loading ),
( see IS : 1893-1975*
IS : 1977-1973t
0.6 \Velding of reinforcement
bars covered in this specification
done in accordance
with t!le requirements
of IS : 2751-1966:. shall be 0.7 In the formulation
of this standard,
due weightage has been given to
among the standards
in different countries in addition to re!ating it to the Practices in the field
in this country.
0.8 For the purpose of deciding
this standard, is complied
with, the final value, observed or calculated,
expressing the result of a test or analysis, shall be rounded off in accordance with IS : 2-19604.
The number of significant places retained in the
rounded off value should be the same as that of the specified value in this
standard. 1. SCOPE
1.1 This standard ( Part I ) covers the requirements
tensile steel plain bars in round and square sections
in concrete. steel and
for use as 2. TEBMINOLOGY
2.0 For the purpose of this standard, the following definitions shall apply.
2.1 Bar - A hot-rolled 2.2 Bundle - Two
2.3 Coil - bar of steel of circular or more One continuous or square ‘ coils ’ or a number of cross-section.
lengths properly bar as rolled in the form of a coil. ‘Criteria for earthquake resistant design of structures (r&d rtiiun ).
tSpecifi:ation for structural steel ( ordinary quality ) ( sccmdretiion ).
$Code of practice for welding of mild steel bars used for reinforced concrete
&Rules for rounding off numerical valua ( m&d). 4 IS : 432 ( Part I ) - 1982 2.4 Elongation
- Increase in length of a tensile test piece under .stress.
at fracture is conventionally
expressed as a percentage
the original gauge len-,th of a standard
Size - The nominal size of a bar shall be the
of the diameter of round bars and side of square bars.
2.6 Parcel - Any quantity of bars whether
and test at any one time. in coils or bundles, dimension
presented 2.7 Ultimate
Stress - The maximum
tensile test clivi:!ed by the original cro;s-sectional
area of the gauge length
portion of ihe test piece.
2.8 Yield Stress - Stress ( that is, load per unit cross-sectional
at which elongation
first occurs in the test piece without
In the case of steels with no such definite yield
point, the yield stress is the stress under the prescribed
at \v!lich the ohserv-ed increase in the gauge length is l/200 of the gauge
length when the rate at which
the load applied
is not more than 5
N/mm’js when approaching
the yield stress.
3. TYPES AND GRADES 3.1 Reinforcement
supplied in accordance
classified into the following type...
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- Fall '13
- Tensile strength, steel bars, mild steel, medium tensile steel, mild steel bars