What do the designations ISNT and ISHT stand for?

ISNT stands for Indian Standard Normal Tee, and ISHT stands for Indian Standard Heavy Tee.

Does this code provide the rolling tolerances for tee sections?

No, dimensional, weight, and rolling tolerances for structural steel sections are covered in IS 1852.

How should a tee section be designated on a structural drawing?

By its series symbol followed by its depth in mm and its weight per meter (e.g., ISNT 50 @ 4.5 kg/m).

IS 1173

: 1978

Hot rolled and slit steel tee bars

CurrentSpecializedSpecificationBIMStructural Engineering · Structural Engineering and Structural Sections

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This standard specifies the nominal dimensions, mass, and sectional properties (area, moments of inertia, radii of gyration) of hot-rolled and slit structural steel tee bars. It serves as a geometric and physical property catalog for structural engineers and detailers designing structural steelwork.

Hot rolled and slit steel tee bars

Quick Reference Values

ISNTIndian Standard Normal Tee Bars

ISHTIndian Standard Heavy Tee Bars

ISLTIndian Standard Light Tee Bars

ISJTIndian Standard Junior Tee Bars

ISSTIndian Standard Special Tee Bars

Practical Notes

Always verify the commercial availability of specific tee sections with local suppliers before specifying them, as rolling mills frequently only produce the most common sizes.

When ready-rolled tee sections are unavailable, they are often substituted by slitting standard I-beams (ISMB) longitudinally.

This code provides standard dimensions and properties, but rolling and cutting tolerances must be referred to IS 1852.