ISHB 450 Weight, Dimensions and IS 808 Properties
ISHB 450 weighs 107.1 kg per metre as per IS 808:1989.
- One 6-metre length weighs 642.6 kg · one 12-metre length weighs 1,285.2 kg
- Overall depth 450 mm · flange width 250 mm · web thickness 9.8 mm
- Cross-sectional area 13,829 mm² · Ixx = 39,210.6 cm⁴
ISHB 450 is the largest and heaviest ISHB section in IS 808:1989. At 107.1 kg/m with a 450 mm depth and 250 mm flange, it is used for the most heavily loaded primary columns in tall multi-bay industrial structures, tall portal frame buildings, and heavy crane runway frames. It exceeds 100 kg/m — crane handling is mandatory at all stages of fabrication and erection.
ISHB 450 Weight Calculator
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ISHB 450 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Overall depth | D | mm | 450 |
| Flange width | B | mm | 250 |
| Web thickness | tw | mm | 9.8 |
| Flange thickness | tf | mm | 13.7 |
| Cross-sectional area | A | mm² | 13,829 |
| Mass per metre | — | kg/m | 107.1 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 39,210.6 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 3,441.3 |
| Elastic section modulus (x–x) | Zxx | cm³ | 1,742.7 |
| Elastic section modulus (y–y) | Zyy | cm³ | 275.3 |
| Radius of gyration (x–x) | rxx | cm | 16.84 |
| Radius of gyration (y–y) | ryy | cm | 4.99 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). Mass tolerance: ±2.5% per piece per IS 808.
Common Applications of ISHB 450
ISHB 450 is specified for primary columns in very heavy industrial buildings above 12 m height, multi-bay tall portal frames, heavy-duty EOT crane runway structures carrying 50+ tonne cranes, and major column members in multi-storey industrial steel frames. The r_xx/r_yy ratio of approximately 3.37 gives very high strong-axis stiffness — y–y axis buckling governs in all but short-column applications. SAIL Bhilai produces ISHB 450 in IS 2062 E250, E350, and E410 grades on indent with lead times of 3–6 weeks. This is not a stocked section at general steel merchants; always confirm availability early in the design stage.
Worked Example
A structural engineer in Pune specifies 8 primary columns of ISHB 450, each 12 m tall, for a heavy engineering plant building. Total length = 8 × 12 = 96 m. Weight = 96 × 107.1 = 10,281.6 kg (10.282 tonnes). At a market rate of ₹64,500 per tonne (Pune, May 2026), the material cost is approximately ₹6,63,170 before base plates, connections, and erection.
Related ISHB Sections
Compare with the next smaller size: ISHB 400 (92.5 kg/m). ISHB 450 is the largest standard ISHB section in IS 808:1989. For all ISHB sizes see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISHB 450 per metre?
ISHB 450 weighs 107.1 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 642.6 kg. For a 12-metre length, total weight is 1,285.2 kg.
ISHB 450 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISHB 450 ka weight 107.1 kg/m hota hai. 6 metre ki ek length ka total weight 642.6 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISHB 450?
ISHB 450 per IS 808:1989 has an overall depth of 450 mm, flange width of 250 mm, web thickness of 9.8 mm, and flange thickness of 13.7 mm. The cross-sectional area is 13,829 mm².
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