ISMB 500 Weight, Dimensions and IS 808 Properties
ISMB 500 weighs 86.9 kg per metre as per IS 808:1989.
- One 6-metre length weighs 521.4 kg · one 12-metre length weighs 1,042.8 kg
- Overall depth 500 mm · flange width 180 mm · web thickness 10.2 mm
- Cross-sectional area 11,090 mm² · Ixx = 45,218.3 cm⁴
ISMB 500 is one of the heaviest sections in the standard ISMB range per IS 808:1989. Its substantially wider 180 mm flange — a jump from 150 mm at ISMB 450 — provides much improved lateral stability and makes it suitable for long-span structures, heavy crane bays, and transfer beams carrying significant loads.
ISMB 500 Weight Calculator
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ISMB 500 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Overall depth | D | mm | 500 |
| Flange width | B | mm | 180 |
| Web thickness | tw | mm | 10.2 |
| Flange thickness | tf | mm | 17.2 |
| Cross-sectional area | A | mm² | 11,090 |
| Mass per metre | — | kg/m | 86.9 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 45,218.3 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 1,369.8 |
| Elastic section modulus (x–x) | Zxx | cm³ | 1,808.7 |
| Elastic section modulus (y–y) | Zyy | cm³ | 152.2 |
| Radius of gyration (x–x) | rxx | cm | 20.19 |
| Radius of gyration (y–y) | ryy | cm | 3.52 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). Mass tolerance: ±2.5% per piece per IS 808.
Common Applications of ISMB 500
ISMB 500 is used for long-span transfer beams, heavy crane runway girders above 25-tonne capacity, and primary beams in multi-storey industrial buildings. The 180 mm flange provides good weak-axis stiffness — ryy of 3.52 cm — making it more forgiving of lateral bracing intervals than narrower heavy sections. SAIL Bhilai supplies ISMB 500 as a standard heavy-section product in IS 2062 E350 grade.
Worked Example
A heavy fabrication plant in Rajkot requires 3 transfer beams of ISMB 500 each 11.0 m long to support a 30-tonne EOT crane bay. Total length = 3 × 11.0 = 33 m. Weight = 33 × 86.9 = 2,867.7 kg (2.868 tonnes). At ₹58,000 per tonne (May 2026), estimated material cost is approximately ₹1,66,340.
Related ISMB Sections
Compare with adjacent sizes: ISMB 450 (72.4 kg/m) · ISMB 550 (103.7 kg/m). For all ISMB sizes see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISMB 500 per metre?
ISMB 500 weighs 86.9 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 521.4 kg. For a 12-metre length, total weight is 1,042.8 kg.
ISMB 500 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISMB 500 ka weight 86.9 kg/m hota hai. 6 metre ki ek length ka total weight 521.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISMB 500?
ISMB 500 per IS 808:1989 has an overall depth of 500 mm, flange width of 180 mm, web thickness of 10.2 mm, and flange thickness of 17.2 mm. The cross-sectional area is 11,090 mm².
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