Where these numbers come from
Every figure on these pages is reproduced from the Indian Standard that publishes it: IS 808 : 2021 for beams, columns, channels, angles and bearing piles, IS 4923 : 2017 as amended for square and rectangular hollow sections, and IS 1161 : 2014 for circular hollow sections. Section properties are facts, and they appear in every steel handbook; what is reproduced here is the numbers, not the text of the standards.
How the tables were checked
These tables carry their own check. Steel has a density of 7 850 kg/m³, and the standards print both the cross-sectional area and the mass per metre, so either one predicts the other. Of the 1,067 sections here, 1,049 agree to better than one percent — the small residual being three-significant-figure rounding in the printed area.
Eighteen do not, and they are marked. On those rows the standard contradicts itself, and both printed figures are shown exactly as issued rather than one being quietly replaced with whichever looks more plausible. Correcting a national standard is not this site’s job; telling you it disagrees with itself, before the number reaches a tender, is.
A second check covers the properties columns, which the first says nothing about. Radius of gyration is √(I/A) by definition, so every table states it three times over — and 107 of the 2,233 radius values disagree with the I and A printed beside them. Nearly all are out by exactly ten, because IS 808 switches that column from millimetres to centimetres partway down without relabelling it: WB 250’s radius is printed 10.6 where its own figures give 106.9 mm. Those rows say so on the page.
What is deliberately missing
IS 1161 prints three more columns for circular hollow sections — internal volume, and external and internal surface area, all per metre. They are not reproduced. The text layer of the published PDF gives a digit too many in 66 of those 240 figures (the external surface of a 33.7 mm tube reads 10059 where the page shows 1 059), and a value that cannot be read cannot be republished. They could be calculated from the tube diameter, and they would be right — but a number worked out here, printed in a column headed with the standard’s name, would not be the standard. If you need them for galvanising or painting quantities, take them from IS 1161 itself.
Flats and round bars are not here either. IS 808 covers beams, columns, channels and angles; IS 4923 and IS 1161 cover hollow sections. Flats are IS 1732, which is not one of the standards these tables were built from.
Working out the weight of a member
Total weight is the mass per metre multiplied by the length and the number of pieces. An MB 300 at 46.02 kg/m, in six-metre lengths, twelve of them, is 46.02 × 6 × 12 = 3 313 kg. Enter a rate per kilogram above and the panel prices it; leave the rate blank and it shows no money at all, because a stale steel rate is worse than none.
If a figure here disagrees with one you already have
Check which edition yours came from before assuming either is wrong. Everything here is IS 808 : 2021, the fourth revision, which merged the parallel-flange series from IS 12778 : 2004 and designates sections without the “IS” prefix — MB 300, not ISMB 300. A great many tables in circulation were copied from the 1989 third revision, and for some sections the two editions do not print the same figures.
One more thing worth knowing if you are reading across from an older table: the 2021 revision also renamed the axes to line up with IS 800. The major axis is now z-z and the minor y-y, so the strong-axis second moment of area appears here as Izz where an older table would call it Ixx. Reading the wrong column is an easy and expensive mistake; the headings here follow the 2021 convention throughout.