ISA 120×80×10 Weight, Dimensions and IS 808 Properties
ISA 120×80×10 weighs 14.9 kg per metre as per IS 808:1989.
- One 6-metre length weighs 89.4 kg · one 12-metre length weighs 178.8 kg
- Long leg 120 mm · short leg 80 mm · thickness 10 mm · area 18.97 cm²
- Maximum principal moment of inertia Iuu = 325.71 cm⁴
ISA 120×80×10 is a standard unequal-leg angle in IS 808:1989. At 14.9 kg/m with a 120 mm long leg and 80 mm short leg, it is used for heavily loaded bracing where the 10 mm wall thickness ensures adequate net section at bolted connections, crane-gantry beam end connections, and truss panel-point gusset plates.
ISA 120×80×10 Weight Calculator
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ISA 120×80×10 — Weight Calculator
IS 808:1989 Dimensions and Sectional Properties
| Property | Symbol | Unit | Value |
|---|---|---|---|
| Long leg | A | mm | 120 |
| Short leg | B | mm | 80 |
| Thickness | t | mm | 10 |
| Cross-sectional area | A | cm² | 18.97 |
| Mass per metre | — | kg/m | 14.9 |
| Centroid from back of long leg | Cxx | cm | 2.76 |
| Centroid from back of short leg | Cyy | cm | 1.66 |
| Moment of inertia (x–x) | Ixx | cm⁴ | 289.3 |
| Moment of inertia (y–y) | Iyy | cm⁴ | 79.49 |
| Moment of inertia (u–u, max principal) | Iuu | cm⁴ | 325.71 |
| Moment of inertia (v–v, min principal) | Ivv | cm⁴ | 43.08 |
| Elastic section modulus (x–x) | Zxx | cm³ | 35.15 |
| Elastic section modulus (y–y) | Zyy | cm³ | 13.87 |
| Radius of gyration (u–u) | ruu | cm | 4.14 |
| Radius of gyration (v–v) | rvv | cm | 1.51 |
| Tangent of principal axis angle | tan α | — | 0.381 |
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 120×80×10
ISA 120×80×10 is used for heavily loaded bracing where the 10 mm wall thickness ensures adequate net section at bolted connections, crane-gantry beam end connections, and truss panel-point gusset plates. 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 Mumbai needs 6 heavily loaded bracing members on a crane gantry frame using ISA 120×80×10, each 2000 mm long. Total length = 6 × 2.0 = 12.0 m. Weight = 12.0 × 14.9 = 178.8 kg. At ₹63,000 per tonne (Mumbai, May 2026), material cost is approximately ₹11,264 before cutting charges.
Related ISA Unequal Angle Sections
Compare with adjacent sizes: ISA 120×80×8 (12.1 kg/m) · ISA 125×75×8 (12.1 kg/m). For all ISA unequal angles see the Section Reference Library →
Frequently Asked Questions
What is the weight of ISA 120×80×10 per metre?
ISA 120×80×10 weighs 14.9 kg per metre as specified in IS 808:1989. For a standard 6-metre length, the total weight is 89.4 kg. For a 12-metre length, total weight is 178.8 kg.
ISA 120×80×10 ka weight per meter kitna hota hai?
IS 808:1989 standard ke according, ISA 120×80×10 ka weight 14.9 kg/m hota hai. 6 metre ki ek length ka total weight 89.4 kg hoga. Zyada accurate calculation ke liye upar diya gaya calculator use karein.
What are the dimensions of ISA 120×80×10?
ISA 120×80×10 per IS 808:1989 has a long leg of 120 mm, short leg of 80 mm, thickness of 10 mm, and cross-sectional area of 18.97 cm².
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