ISA 45×30×4 Weight, Dimensions and IS 808 Properties
ISA 45×30×4 weighs 2.2 kg per metre as per IS 808:1989.
- One 6-metre length weighs 13.2 kg · one 12-metre length weighs 26.4 kg
- Long leg 45 mm · short leg 30 mm · thickness 4 mm · area 2.82 cm²
- Maximum principal moment of inertia Iuu = 6.48 cm⁴
ISA 45×30×4 is a standard unequal-leg angle in IS 808:1989. At 2.2 kg/m with a 45 mm long leg and 30 mm short leg, it is used for light purlin cleats on agricultural sheds, secondary bracing clip angles, and support brackets for light conveyor frames.
ISA 45×30×4 Weight Calculator
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ISA 45×30×4 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 45 |
| Short leg | B | mm | 30 |
| Thickness | t | mm | 4 |
| Cross-sectional area | A | cm² | 2.82 |
| Mass per metre | — | kg/m | 2.2 |
| Centroid from back of long leg | Cxx | cm | 1.14 |
| Centroid from back of short leg | Cyy | cm | 0.64 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 5.77 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 1.5 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 6.48 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 0.79 |
| Elastic section modulus (x–x) | Zxx | cm³ | 1.84 |
| Elastic section modulus (y–y) | Zyy | cm³ | 0.71 |
| Radius of gyration (u–u) | ruu | cm | 1.52 |
| Radius of gyration (v–v) | rvv | cm | 0.53 |
| Tangent of principal axis angle | tan α | — | 0.358 |
Dimensions and properties as per IS 808:1989 (reaffirmed 2021). x–x axis is parallel to the long leg; y–y axis is parallel to the short leg; u–u is the maximum principal axis at angle α to x–x. Mass tolerance: ±3% per piece per IS 808.
Common Applications of ISA 45×30×4
ISA 45×30×4 is used for light purlin cleats on agricultural sheds, secondary bracing clip angles, and support brackets for light conveyor frames. General steel merchants and angle stockists carry this size in IS 2062 E250 grade in 6 m and 12 m lengths. JSPL, SAIL, and RINL (Vizag Steel) all roll this designation to IS 808:1989 as standard stock.
Worked Example
A fabricator in Surat needs 100 purlin cleats for a poultry shed using ISA 45×30×4, each 120 mm long. Total length = 100 × 0.12 = 12.0 m. Weight = 12.0 × 2.2 = 26.4 kg. At ₹63,000 per tonne (Surat, May 2026), material cost is approximately ₹1,663 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 40×25×4 (1.9 kg/m) · ISA 50×30×5 (3.0 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 45×30×4 per metre?
ISA 45×30×4 weighs 2.2 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 13.2 kg. For a 12-metre length, total weight is 26.4 kg.
ISA 45×30×4 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 45×30×4 ka weight 2.2 kg/m hota hai. 6 metre ki ek length ka total weight 13.2 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 45×30×4?
ISA 45×30×4 per IS 808:1989 has a long leg of 45 mm, short leg of 30 mm, thickness of 4 mm, and cross-sectional area of 2.82 cm².
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