ISMB 550 Weight, Dimensions and IS 808 Properties
ISMB 550 weighs 103.7 kg per metre as per IS 808:1989.
- One 6-metre length weighs 622.2 kg · one 12-metre length weighs 1,244.4 kg
- Overall depth 550 mm · flange width 190 mm · web thickness 11.2 mm
- Cross-sectional area 13,210 mm² · Ixx = 64,893.6 cm⁴
ISMB 550 is a very heavy structural beam per IS 808:1989, used in major industrial structures, bridge girders, and heavy crane bays. At over 100 kg/m it is typically handled by crane during erection. Its Ixx of 64,894 cm⁴ makes it suitable for spans exceeding 10 m under heavy uniform loads.
ISMB 550 Weight Calculator
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ISMB 550 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Overall depth | D | mm | 550 |
| Flange width | B | mm | 190 |
| Web thickness | tw | mm | 11.2 |
| Flange thickness | tf | mm | 19.3 |
| Cross-sectional area | A | mm² | 13,210 |
| Mass per metre | — | kg/m | 103.7 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 64,893.6 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 1,836.2 |
| Elastic section modulus (x–x) | Zxx | cm³ | 2,360.9 |
| Elastic section modulus (y–y) | Zyy | cm³ | 193.3 |
| Radius of gyration (x–x) | rxx | cm | 22.17 |
| Radius of gyration (y–y) | ryy | cm | 3.73 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). Mass tolerance: ±2.5% per piece per IS 808.
Common Applications of ISMB 550
ISMB 550 is used for major transfer girders, long-span industrial floor beams, and bridge superstructure elements. It requires crane handling at all stages of fabrication and erection. SAIL Bhilai is the primary domestic supplier of ISMB 550 in IS 2062 E350 grade; it is typically ordered on indent rather than held as yard stock.
Worked Example
A bridge fabricator in Vadodara requires 2 main girders of ISMB 550 each 12.0 m long for a pedestrian bridge. Total length = 2 × 12.0 = 24 m. Weight = 24 × 103.7 = 2,488.8 kg (2.489 tonnes). At ₹58,000 per tonne (May 2026), estimated material cost is approximately ₹1,44,360.
Related ISMB Sections
Compare with adjacent sizes: ISMB 500 (86.9 kg/m) · ISMB 600 (122.6 kg/m). For all ISMB sizes see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISMB 550 per metre?
ISMB 550 weighs 103.7 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 622.2 kg. For a 12-metre length, total weight is 1,244.4 kg.
ISMB 550 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISMB 550 ka weight 103.7 kg/m hota hai. 6 metre ki ek length ka total weight 622.2 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISMB 550?
ISMB 550 per IS 808:1989 has an overall depth of 550 mm, flange width of 190 mm, web thickness of 11.2 mm, and flange thickness of 19.3 mm. The cross-sectional area is 13,210 mm².
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