ISMB 400 Weight, Dimensions and IS 808 Properties
ISMB 400 weighs 61.6 kg per metre as per IS 808:1989.
- One 6-metre length weighs 369.6 kg · one 12-metre length weighs 739.2 kg
- Overall depth 400 mm · flange width 140 mm · web thickness 8.9 mm
- Cross-sectional area 7,840 mm² · Ixx = 20,458.4 cm⁴
ISMB 400 is a large medium beam per IS 808:1989, used in heavy industrial structures, multi-storey frames, and long-span crane runway girders. Its Ixx of 20,458 cm⁴ makes it one of the stiffest beams in the ISMB range below the heavy 500-series.
ISMB 400 Weight Calculator
Enter the total length in metres to calculate weight.
ISMB 400 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Overall depth | D | mm | 400 |
| Flange width | B | mm | 140 |
| Web thickness | tw | mm | 8.9 |
| Flange thickness | tf | mm | 16.0 |
| Cross-sectional area | A | mm² | 7,840 |
| Mass per metre | — | kg/m | 61.6 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 20,458.4 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 622.1 |
| Elastic section modulus (x–x) | Zxx | cm³ | 1,022.9 |
| Elastic section modulus (y–y) | Zyy | cm³ | 88.9 |
| Radius of gyration (x–x) | rxx | cm | 16.16 |
| Radius of gyration (y–y) | ryy | cm | 2.82 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). Mass tolerance: ±2.5% per piece per IS 808.
Common Applications of ISMB 400
ISMB 400 is used for heavy crane runway girders up to 20-tonne capacity, transfer beams in multi-storey steel structures, and long-span industrial floor beams. SAIL's Bhilai plant and Tata Steel supply ISMB 400 in IS 2062 E300 and E350 grades as standard heavy-section stock.
Worked Example
A structural engineer in Delhi specifies 5 transfer beams of ISMB 400 each 9.0 m long for a multi-storey steel frame. Total length = 5 × 9.0 = 45 m. Weight = 45 × 61.6 = 2,772 kg (2.772 tonnes). At ₹58,000 per tonne (May 2026), estimated material cost is approximately ₹1,60,780.
Related ISMB Sections
Compare with adjacent sizes: ISMB 350 (52.4 kg/m) · ISMB 450 (72.4 kg/m). For all ISMB sizes see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISMB 400 per metre?
ISMB 400 weighs 61.6 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 369.6 kg. For a 12-metre length, total weight is 739.2 kg.
ISMB 400 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISMB 400 ka weight 61.6 kg/m hota hai. 6 metre ki ek length ka total weight 369.6 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISMB 400?
ISMB 400 per IS 808:1989 has an overall depth of 400 mm, flange width of 140 mm, web thickness of 8.9 mm, and flange thickness of 16.0 mm. The cross-sectional area is 7,840 mm².
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