Standard Specifications for Structural Steel:

All design in structural steel in this country generally conforms to the IS 800: 1984 which, thus, should be constantly consulted. The structural steel they should be from one of the following types:

(a)        Structural Steel (Standard Quality) IS 226: 1975

This is the standard mild steel Fe 410-S of tested quality.

(b)       Structural Steel (Ordinary Quality) IS 1977: 1975

This is mild steel not complying to (a) above.

(c)        Weldable Structural Steel IS 2062: 1984

They are specially suitable for structures subjected to dynamic and impact loads, e.g. bridge and crane girders.

(d)       Structural Steel (High Tensile) IS 961: 1975

They have got improved mechanical properties and corrosion resistance.

(e)        Weldable Structural Steel (Medium and High Strength Qualities) IS 8500: 1977

The above given are a number of special purpose steel.

All the above categories of structural steel differ among themselves in their physico-mechanical properties and chemical composition.