ISA 20×20×3 Weight, Dimensions and IS 808 Properties
ISA 20×20×3 weighs 0.9 kg per metre as per IS 808:1989.
- One 6-metre length weighs 5.4 kg · one 12-metre length weighs 10.8 kg
- Leg 20 mm × thickness 3 mm · root radius 3.5 mm
- Cross-sectional area 1.13 cm² · Iuu = 0.4 cm⁴
ISA 20×20×3 is the smallest standard equal-leg angle in IS 808:1989. At 0.9 kg/m with a 20 mm leg it is used for light cleats, fixing brackets, cable clips, and minor secondary steel in equipment frames and electrical enclosures.
ISA 20×20×3 Weight Calculator
Enter the total length in metres to calculate weight.
ISA 20×20×3 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Leg length | A | mm | 20 |
| Thickness | t | mm | 3 |
| Root radius | r1 | mm | 3.5 |
| Cross-sectional area | A | cm² | 1.13 |
| Mass per metre | — | kg/m | 0.9 |
| Centroid distance (Cxx = Cyy) | Cxx | cm | 0.56 |
| Moment of inertia (u–u, max) | Iuu | cm⁴ | 0.4 |
| Moment of inertia (v–v, min) | Ivv | cm⁴ | 0.1 |
| Elastic section modulus (u–u) | Zuu | cm³ | 0.29 |
| Radius of gyration (u–u) | ruu | cm | 0.6 |
| Radius of gyration (v–v) | rvv | cm | 0.3 |
Dimensions and properties as per IS 808:1989 (Reaffirmed 2001). Mass tolerance: ±3% per piece as per IS 808. u–u is the major principal axis at 45° to both legs; v–v is the minor principal axis. Zvv is not published in IS 808:1989 for angle sections.
Common Applications of ISA 20×20×3
ISA 20×20×3 is used for cable tray clips, thin fixing cleats, equipment panel brackets, door stops, and minor secondary connections in fabricated steel assemblies. It is commonly stocked in short lengths at general hardware and steel merchants across India.
Worked Example
An electrical contractor in Surat needs 200 cable tray support cleats of ISA 20×20×3, each 80 mm long. Total length = 200 × 0.08 = 16 m. Weight = 16 × 0.9 = 14.4 kg. At ₹65,000 per tonne (Surat, May 2026), material cost is approximately ₹936.
Related ISA Equal Angle Sections
No smaller ISA equal-leg angle exists in IS 808:1989. Compare with next size: ISA 25×25×3 (1.1 kg/m). For all ISA equal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 20×20×3 per metre?
ISA 20×20×3 weighs 0.9 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 5.4 kg. For a 12-metre length, total weight is 10.8 kg.
ISA 20×20×3 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 20×20×3 ka weight 0.9 kg/m hota hai. 6 metre ki ek length ka total weight 5.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 20×20×3?
ISA 20×20×3 per IS 808:1989 has a leg length of 20 mm, thickness of 3 mm, and root radius of 3.5 mm. The cross-sectional area is 1.13 cm².
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