channel — 34.2 kg per metre, 43.4 cm² cross-sectional area. IS 808 Table 6 - Sloping Flange Channels.
Sloping Flange Channels (MC). Reproduced as printed in IS 808 Table 6 - Sloping Flange Channels.
A radius of gyration here disagrees with this row’s own I and A
Quote the mass when you order this section
As printed in IS 808 Table 6 - Sloping Flange Channels. 250 mm deep, 82 mm wide. Units are shown on every row, because the two standards on this site use different ones for the radius of gyration.
| Depth of section D | 250 | mm |
|---|---|---|
| Width of flange B | 82 | mm |
| Thickness of web t | 9 | mm |
| Thickness of flange T | 14.1 | mm |
| Flange slope | 96 | ° |
| Root radius R1 | 12 | mm |
| Toe radius R2 | 3.2 | mm |
| Centroid from back of web Cy | 22.3 | mm |
|---|
| Mass per metre M | 34.2 | kg/m |
|---|---|---|
| Sectional area A | 43.4 | cm² |
| Second moment of area Izz | 4,060 | cm⁴ |
|---|---|---|
| Radius of gyration rzz | 96.8 | mm |
| Elastic section modulus Zzz | 325 | cm³ |
| Plastic section modulus Zpz | 386 | cm³ |
| Second moment of area Iyy | 242 | cm⁴ |
|---|---|---|
| Radius of gyration ryy | 2.36 | mm |
| Elastic section modulus Zyy | 40.7 | cm³ |
| Plastic section modulus Zpy | 78.7 | cm³ |
| Torsion constant (St Venant) It | 22.8 | cm⁴ |
|---|---|---|
| Warping constant Iw | 30,600 | cm⁶ |
Total weight is the mass per metre multiplied by the length and the number of pieces. Ten pieces of MC 250* at six metres each is 34.2 × 6 × 10 = 2,052 kg. There is nothing else to it — the standard publishes the mass, so no one needs to compute it from the area.
You can check that mass against the area on this page: 43.4 cm² of steel at 7 850 kg/m³ is 34.07 kg/m. Every row in this dataset was checked that way, which is how the contradictions flagged on some of these pages were found.
Work it out for your own lengths and quantities →
IS 808 : 2021 gives MC 250* a mass of 34.2 kg per metre. Its printed cross-sectional area of 43.4 cm² agrees: 43.4 cm² of steel at 7 850 kg/m³ works out at 34.07 kg per metre.
205.20 kg. Mass per metre times length: 34.2 × 6. Ten such pieces come to 2052 kg.
It is the same section under the name IS 808 : 2021 gives it — the 2021 revision of IS 808 dropped the "IS" prefix, so a drawing saying ISMC 250* means this section. Check the edition before assuming the figures match, though: this page publishes the current tables, and a great many tables in circulation were copied from the 1989 edition.
250 mm deep and 82 mm wide, with a 9 mm web and 14.1 mm flanges.
IS 808 marks this designation with an asterisk, and its own footnote explains why: the heavier sections of a size come off the same rolls as the lighter ones, by spreading the rolls. The standard therefore says the mass should be mentioned when ordering — the designation alone does not identify which section you get.
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Log in to QuickBOQ →Where these figures come from. IS 808 Table 6 - Sloping Flange Channels Section properties are facts published in the standards, and they are reproduced here as printed. Where a standard contradicts itself, both of its figures are shown and neither is corrected.
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