ISA 120×120×12 Weight, Dimensions and IS 808 Properties
ISA 120×120×12 weighs 21.4 kg per metre as per IS 808:1989.
- One 6-metre length weighs 128.4 kg · one 12-metre length weighs 256.8 kg
- Leg 120 mm × thickness 12 mm · root radius 13.0 mm
- Cross-sectional area 27.33 cm² · Iuu = 334.0 cm⁴
ISA 120×120×12 is the heavier 120 mm equal-leg angle in IS 808:1989. At 21.4 kg/m it provides 19% more cross-sectional area than ISA 120×120×10, used for heavily loaded primary chord members in large industrial trusses and compound column sections under high axial compression.
ISA 120×120×12 Weight Calculator
Enter the total length in metres to calculate weight.
ISA 120×120×12 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Leg length | A | mm | 120 |
| Thickness | t | mm | 12 |
| Root radius | r1 | mm | 13.0 |
| Cross-sectional area | A | cm² | 27.33 |
| Mass per metre | — | kg/m | 21.4 |
| Centroid distance (Cxx = Cyy) | Cxx | cm | 2.98 |
| Moment of inertia (u–u, max) | Iuu | cm⁴ | 334.0 |
| Moment of inertia (v–v, min) | Ivv | cm⁴ | 86.74 |
| Elastic section modulus (u–u) | Zuu | cm³ | 40.0 |
| Radius of gyration (u–u) | ruu | cm | 3.5 |
| Radius of gyration (v–v) | rvv | cm | 1.78 |
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 120×120×12
ISA 120×120×12 is used for heavily loaded primary truss chord members, built-up compound column sections under very high axial load, primary heavy wind bracing members, and large high-load bolted connections. Available from JSPL, Tata Steel, and SAIL.
Worked Example
A structural engineer in Bengaluru specifies ISA 120×120×12 for 8 heavily loaded chord members, each 6 m long, for a 30 m span heavy industrial truss. Total length = 8 × 6 = 48 m. Weight = 48 × 21.4 = 1,027.2 kg (1.027 tonnes). At ₹62,000 per tonne (Bengaluru, May 2026), material cost is approximately ₹63,686.
Related ISA Equal Angle Sections
Compare with adjacent sizes: ISA 120×120×10 (18.1 kg/m) · ISA 130×130×10 (19.6 kg/m). For all ISA equal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 120×120×12 per metre?
ISA 120×120×12 weighs 21.4 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 128.4 kg. For a 12-metre length, total weight is 256.8 kg.
ISA 120×120×12 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 120×120×12 ka weight 21.4 kg/m hota hai. 6 metre ki ek length ka total weight 128.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 120×120×12?
ISA 120×120×12 per IS 808:1989 has a leg length of 120 mm, thickness of 12 mm, and root radius of 13.0 mm. The cross-sectional area is 27.33 cm².
Need weight for a different section type? Our free Metal Weight Calculator covers all IS 808 sections, pipes, bars, and hollow sections.
Try the Free Metal Weight Calculator →